add legend to one of the graphs in -graph combine-

[Liu Qiang]

Dear all statalisters,
I now face a problem on how to add a legend to a combined graph [Either the first or the last is ok]. My code and simulation data are as follows:

local i=1
foreach var in yedu male exp exp2 marriage public technical selfem lnseadis service invshare lnpd{
tw (rarea _lb_ _ub_ q if var=="`var'" & year==2005, astyle(ci) legend(off)  acolor(%10)) ///
   (line _b_ q if var=="`var'" & year==2005, lp(solid) lc(black) lwidth(medthick))     ///
   (rarea _lb_ _ub_ q if var=="`var'" & year==2017, astyle(ci) legend(off) acolor(%70)) ///
   (line _b_ q if var=="`var'" & year==2017, lp(dash) lc(black) lwidth(medthick))    ///
   , ylabel(,grid) legend(off) xtitle("") ytitle("`var'")  xlab(10(10)90)
graph save `i'.gph,replace
local `i++'
}

forvalues i=1/12{
local j `j' `i'.gph
}
graph combine `j', rows(3)  xcommon  b1title(Quantile) xsize(20) ysize(15)

Now I want to add the legend to one of them:

legend(order(1 "" 2 "Year=2005" 3 "" 4 "Year=2017"))

But don't know how to do that. Anyone knows or has any advice? Thanks in advance.

* Example generated by -dataex-. To install: ssc install dataex
clear
input double q str9 var double(_b_ _lb_ _ub_ year)
10 "exp"           .7060326085590829    .6060326085590829    .8060326085590829 2017
10 "exp2"           .726402675659736    .6264026756597361     .826402675659736 2017
10 "invshare"     -.5658946129590842   -.6658946129590841   -.4658946129590842 2017
10 "lnpd"          .5519959561074571   .45199595610745713    .6519959561074571 2017
10 "lnseadis"    -.18153243202494282   -.2815324320249428  -.08153243202494281 2017
10 "male"         -.0845013554436748   -.1845013554436748    .0154986445563252 2017
10 "marriage"     -.4041389284762828   -.5041389284762828  -.30413892847628277 2017
10 "public"      .020004355394671065  -.07999564460532894   .12000435539467107 2017
10 "selfem"       .48433854112936714   .38433854112936716    .5843385411293671 2017
10 "service"      -.7991442906253145   -.8991442906253144   -.6991442906253145 2017
10 "technical"     .9090786318579027    .8090786318579027   1.0090786318579028 2017
10 "yedu"        -1.9924347702665213   -2.092434770266521  -1.8924347702665212 2017
20 "exp"          1.0829853467028185    .9829853467028186   1.1829853467028186 2017
20 "exp2"        -.16090842717953516  -.26090842717953516  -.06090842717953515 2017
20 "invshare"     .30674478942922984   .20674478942922983   .40674478942922987 2017
20 "lnpd"         -.5065183852493573   -.6065183852493573  -.40651838524935735 2017
20 "lnseadis"    -.43572051644296983   -.5357205164429698  -.33572051644296985 2017
20 "male"          1.651875636929618   1.5518756369296178    1.751875636929618 2017
20 "marriage"     -.6447973998713261   -.7447973998713261   -.5447973998713261 2017
20 "public"       -.4175254237175186   -.5175254237175186   -.3175254237175186 2017
20 "selfem"       2.0411698908918843   1.9411698908918842   2.1411698908918844 2017
20 "service"      .06722946758118882 -.032770532418811185   .16722946758118884 2017
20 "technical"     .7322509269000815    .6322509269000816    .8322509269000815 2017
20 "yedu"         1.5519754699023833   1.4519754699023832   1.6519754699023834 2017
30 "exp"          -.9745130346488835  -1.0745130346488836   -.8745130346488835 2017
30 "exp2"         -.5929022500919842   -.6929022500919841   -.4929022500919842 2017
30 "invshare"    -.04031543219538614  -.14031543219538614   .05968456780461386 2017
30 "lnpd"        -1.2118245071664837  -1.3118245071664838  -1.1118245071664836 2017
30 "lnseadis"    -1.2209557864199687  -1.3209557864199688  -1.1209557864199686 2017
30 "male"          .6098041899993792    .5098041899993793    .7098041899993792 2017
30 "marriage"       1.21755898947616     1.11755898947616   1.3175589894761601 2017
30 "public"       -.6499796163777138   -.7499796163777138   -.5499796163777139 2017
30 "selfem"       .19196218557171718   .09196218557171718   .29196218557171716 2017
30 "service"   -.0034875439349294104  -.10348754393492941    .0965124560650706 2017
30 "technical"     .5933717454929767    .4933717454929767    .6933717454929766 2017
30 "yedu"        -3.1938794302683875  -3.2938794302683876  -3.0938794302683874 2017
40 "exp"         -1.2075545364948739   -1.307554536494874  -1.1075545364948738 2017
40 "exp2"        -1.9497608851450245  -2.0497608851450244  -1.8497608851450245 2017
40 "invshare"    -1.0852834880823283  -1.1852834880823284   -.9852834880823284 2017
40 "lnpd"         1.2278354438237018   1.1278354438237017   1.3278354438237019 2017
40 "lnseadis"    -.08949357837845028  -.18949357837845027   .01050642162154973 2017
40 "male"         -.7817259898991239   -.8817259898991239   -.6817259898991239 2017
40 "marriage"   -.006298525444925158  -.10629852544492516   .09370147455507485 2017
40 "public"        .5736665843136239   .47366658431362396    .6736665843136239 2017
40 "selfem"       -.3752464572498259  -.47524645724982595   -.2752464572498259 2017
40 "service"      1.2438163623197571    1.143816362319757   1.3438163623197572 2017
40 "technical"    -.5654756492131274   -.6654756492131274  -.46547564921312745 2017
40 "yedu"        -1.2650579569018414  -1.3650579569018415  -1.1650579569018413 2017
50 "exp"          -.2365498864312237  -.33654988643122374   -.1365498864312237 2017
50 "exp2"         .32974943774979143   .22974943774979142   .42974943774979146 2017
50 "invshare"    -1.8187317179648683  -1.9187317179648684  -1.7187317179648682 2017
50 "lnpd"         .18099392257039001   .08099392257039001      .28099392257039 2017
50 "lnseadis"     -.3677759766603274  -.46777597666032744   -.2677759766603274 2017
50 "male"         -.6410358243192722   -.7410358243192722   -.5410358243192722 2017
50 "marriage"    -1.1088816736197935  -1.2088816736197936  -1.0088816736197934 2017
50 "public"      -2.7357945990952226  -2.8357945990952227  -2.6357945990952225 2017
50 "selfem"       -.4734398368242343   -.5734398368242343   -.3734398368242343 2017
50 "service"      -.9467615933164374  -1.0467615933164374   -.8467615933164374 2017
50 "technical"    2.4852312200608773    2.385231220060877   2.5852312200608774 2017
50 "yedu"         -.9572937265254512  -1.0572937265254512   -.8572937265254512 2017
60 "exp"           .3710736268929003   .27107362689290027   .47107362689290033 2017
60 "exp2"         -1.951609032388604   -2.051609032388604  -1.8516090323886039 2017
60 "invshare"     -.9805115295034632  -1.0805115295034633   -.8805115295034632 2017
60 "lnpd"          .7717659733708064    .6717659733708065    .8717659733708064 2017
60 "lnseadis"      .6700023387393872    .5700023387393872    .7700023387393872 2017
60 "male"        -.45933323251556496    -.559333232515565   -.3593332325155649 2017
60 "marriage"     1.0865013213712056    .9865013213712056   1.1865013213712057 2017
60 "public"       -1.022195441348625   -1.122195441348625    -.922195441348625 2017
60 "selfem"       .08064687391805621 -.019353126081943797   .18064687391805623 2017
60 "service"      1.2051993292555434   1.1051993292555433   1.3051993292555435 2017
60 "technical" -.0013385085247690181  -.10133850852476903   .09866149147523098 2017
60 "yedu"        -.02403024380600702  -.12403024380600702   .07596975619399299 2017
70 "exp"         -.24799516564594717   -.3479951656459472  -.14799516564594717 2017
70 "exp2"        -2.1129778707936158   -2.212977870793616  -2.0129778707936157 2017
70 "invshare"       .636780454799782     .536780454799782    .7367804547997819 2017
70 "lnpd"          .9070299072318028    .8070299072318028   1.0070299072318027 2017
70 "lnseadis"    -1.2069927673694567  -1.3069927673694568  -1.1069927673694566 2017
70 "male"        .022509918628805206   -.0774900813711948   .12250991862880521 2017
70 "marriage"      .5330289169453144    .4330289169453144    .6330289169453144 2017
70 "public"       1.2335043992840387   1.1335043992840386   1.3335043992840387 2017
70 "selfem"         .402445762522508     .302445762522508     .502445762522508 2017
70 "service"       .1849343236595295   .08493432365952949   .28493432365952953 2017
70 "technical"   -1.0342492060198605  -1.1342492060198606   -.9342492060198605 2017
70 "yedu"         1.0906702127939947    .9906702127939947   1.1906702127939948 2017
80 "exp"          1.2355772131283367   1.1355772131283366   1.3355772131283368 2017
80 "exp2"         -.7889047479434359   -.8889047479434359   -.6889047479434359 2017
80 "invshare"       .680144929712355     .580144929712355    .7801449297123549 2017
80 "lnpd"         -.6876543138315264   -.7876543138315264   -.5876543138315264 2017
80 "lnseadis"    -.28344997391548615   -.3834499739154862  -.18344997391548615 2017
80 "male"         .07918646862877618 -.020813531371223826   .17918646862877619 2017
80 "marriage"      .9567095536698645    .8567095536698646   1.0567095536698645 2017
80 "public"       -.5339290822611201   -.6339290822611201  -.43392908226112015 2017
80 "selfem"       -1.459664238591389   -1.559664238591389  -1.3596642385913889 2017
80 "service"      -.3041234432769887   -.4041234432769887   -.2041234432769887 2017
80 "technical"    -.4791620155276589   -.5791620155276589  -.37916201552765894 2017
80 "yedu"         .13618378076096568   .03618378076096568    .2361837807609657 2017
90 "exp"         -.06444355757461907   -.1644435575746191   .03555644242538093 2017
90 "exp2"         -.4899046792068609    -.589904679206861   -.3899046792068609 2017
90 "invshare"     1.4376663542636432    1.337666354263643   1.5376663542636433 2017
90 "lnpd"         -.8007832611629466   -.9007832611629466   -.7007832611629467 2017
90 "lnseadis"      .7495925808932434    .6495925808932435    .8495925808932434 2017
90 "male"         .21165050395802154   .11165050395802154    .3116505039580215 2017
90 "marriage"      .2749107419789901   .17491074197899012    .3749107419789901 2017
90 "public"      -.06498988433894477   -.1649898843389448   .03501011566105523 2017
90 "selfem"      -1.7271415617216357  -1.8271415617216358  -1.6271415617216356 2017
90 "service"      -.1548813266071734  -.25488132660717344   -.0548813266071734 2017
90 "technical"     .7382658608899583    .6382658608899583    .8382658608899583 2017
90 "yedu"          .7893005837575984    .6893005837575984    .8893005837575984 2017
10 "exp"         -1.8890132964697564  -1.9890132964697564  -1.7890132964697563 2005
10 "exp2"        -1.2138375042556755  -1.3138375042556756  -1.1138375042556754 2005
10 "invshare"     -.7084165727951628   -.8084165727951628   -.6084165727951628 2005
10 "lnpd"        -.27580260801127743   -.3758026080112774  -.17580260801127742 2005
10 "lnseadis"      .7038005135292276    .6038005135292276    .8038005135292275 2005
10 "male"          .3161040877639832   .21610408776398318    .4161040877639832 2005
10 "marriage"    -.27828842550384214   -.3782884255038421  -.17828842550384214 2005
10 "public"       -.3758992940731389   -.4758992940731389  -.27589929407313885 2005
10 "selfem"      -1.0313008262839232  -1.1313008262839233   -.9313008262839232 2005
10 "service"     -.23125314985935788   -.3312531498593579  -.13125314985935788 2005
10 "technical"      1.37436465266078     1.27436465266078     1.47436465266078 2005
10 "yedu"         2.0953068266163077   1.9953068266163076    2.195306826616308 2005
20 "exp"         .021011085745716262  -.07898891425428374   .12101108574571627 2005
20 "exp2"          .3919922525878253   .29199225258782524    .4919922525878253 2005
20 "invshare"      .9191590999563001    .8191590999563001      1.0191590999563 2005
20 "lnpd"         .23248651982187216   .13248651982187215   .33248651982187216 2005
20 "lnseadis"     -.8747825311411459   -.9747825311411459   -.7747825311411459 2005
20 "male"          -.524618357845267    -.624618357845267    -.424618357845267 2005
20 "marriage"     1.3766135428341604   1.2766135428341603   1.4766135428341605 2005
20 "public"      -1.6790905585590263  -1.7790905585590264  -1.5790905585590262 2005
20 "selfem"       1.3212453162175546   1.2212453162175545   1.4212453162175547 2005
20 "service"      -.6270379523590176   -.7270379523590176   -.5270379523590176 2005
20 "technical"    -.7538634927913619   -.8538634927913619   -.6538634927913619 2005
20 "yedu"         2.2295590120110673   2.1295590120110672   2.3295590120110674 2005
30 "exp"           .1185263167302499   .01852631673024989   .21852631673024991 2005
30 "exp2"         1.2592674623423883   1.1592674623423882   1.3592674623423884 2005
30 "invshare"     -1.478835749983807   -1.578835749983807  -1.3788357499838069 2005
30 "lnpd"           -.62206091131887     -.72206091131887     -.52206091131887 2005
30 "lnseadis"     1.4115575948587267   1.3115575948587266   1.5115575948587268 2005
30 "male"          -2.53358759877479    -2.63358759877479    -2.43358759877479 2005
30 "marriage"      .3870656923327805   .28706569233278045    .4870656923327805 2005
30 "public"      -.28851945120968414   -.3885194512096841  -.18851945120968414 2005
30 "selfem"       -.9287874106075915  -1.0287874106075916   -.8287874106075915 2005
30 "service"      -.1596153546379324   -.2596153546379324  -.05961535463793238 2005
30 "technical"    -2.897404950987232   -2.997404950987232   -2.797404950987232 2005
30 "yedu"         -.6056365224412789   -.7056365224412788   -.5056365224412789 2005
40 "exp"             .23089607277461      .13089607277461      .33089607277461 2005
40 "exp2"         -.2868930695307711  -.38689306953077107   -.1868930695307711 2005
40 "invshare"    -1.2623050041042263  -1.3623050041042264  -1.1623050041042262 2005
40 "lnpd"        -1.1717716017406923  -1.2717716017406924  -1.0717716017406922 2005
40 "lnseadis"     .18873171128815305   .08873171128815305   .28873171128815306 2005
40 "male"         1.0632136758023543    .9632136758023543   1.1632136758023544 2005
40 "marriage"      .5146290526166754    .4146290526166754    .6146290526166753 2005
40 "public"      -.32373775060520665   -.4237377506052067  -.22373775060520665 2005
40 "selfem"       .10355101002676222 .0035510100267622108   .20355101002676224 2005
40 "service"       .3324829330582776   .23248293305827758   .43248293305827756 2005
40 "technical"   -.07134033978009104  -.17134033978009106   .02865966021990897 2005
40 "yedu"        -.09577237531754226  -.19577237531754227  .004227624682457742 2005
50 "exp"         -.32671564766757644   -.4267156476675764  -.22671564766757643 2005
50 "exp2"         -.9778696102160698  -1.0778696102160699   -.8778696102160698 2005
50 "invshare"     1.4644264382242749   1.3644264382242748    1.564426438224275 2005
50 "lnpd"          .9441876300023767    .8441876300023767   1.0441876300023767 2005
50 "lnseadis"     1.4360728923125161    1.336072892312516   1.5360728923125162 2005
50 "male"          .9277529067877425    .8277529067877425   1.0277529067877424 2005
50 "marriage"     .33104118260991483   .23104118260991482   .43104118260991486 2005
50 "public"       .33265611556291613   .23265611556291613   .43265611556291617 2005
50 "selfem"        .9129689049088233    .8129689049088233   1.0129689049088233 2005
50 "service"       .5025849123300492    .4025849123300492    .6025849123300492 2005
50 "technical"    -1.406230651738646  -1.5062306517386461   -1.306230651738646 2005
50 "yedu"        -1.4126941948811649   -1.512694194881165  -1.3126941948811648 2005
60 "exp"          -.7016018139303309   -.8016018139303309    -.601601813930331 2005
60 "exp2"        -.05807700174125756  -.15807700174125755   .04192299825874245 2005
60 "invshare"      .7852508380797718    .6852508380797718    .8852508380797718 2005
60 "lnpd"          .9475525047558369    .8475525047558369    1.047552504755837 2005
60 "lnseadis"      2.014875498296482   1.9148754982964817    2.114875498296482 2005
60 "male"        -.07212611655964384  -.17212611655964383   .02787388344035617 2005
60 "marriage"     -1.892421968411205   -1.992421968411205  -1.7924219684112048 2005
60 "public"       1.5846272252366067   1.4846272252366066   1.6846272252366068 2005
60 "selfem"        .7490779754056119     .649077975405612    .8490779754056119 2005
60 "service"      -.1164312414968339   -.2164312414968339 -.016431241496833893 2005
60 "technical"    .03716339339416066  -.06283660660583934   .13716339339416067 2005
60 "yedu"         -.5253382170798304   -.6253382170798304  -.42533821707983044 2005
70 "exp"          -2.025942412138202   -2.125942412138202  -1.9259424121382018 2005
70 "exp2"         1.0482071797535162    .9482071797535162   1.1482071797535163 2005
70 "invshare"       .892439542285959     .792439542285959     .992439542285959 2005
70 "lnpd"          .1429070275274854    .0429070275274854   .24290702752748541 2005
70 "lnseadis"    -1.7745921901905606  -1.8745921901905607  -1.6745921901905605 2005
70 "male"        -.32565181742246213  -.42565181742246216  -.22565181742246213 2005
70 "marriage"      .6739056583283646    .5739056583283646    .7739056583283646 2005
70 "public"      -.12805864602638117  -.22805864602638118 -.028058646026381168 2005
70 "selfem"       .49386549446324046    .3938654944632405    .5938654944632404 2005
70 "service"     -1.7038848117176781  -1.8038848117176782   -1.603884811717678 2005
70 "technical"     .3752526191025417   .27525261910254173    .4752526191025417 2005
70 "yedu"         -.6851990274761571   -.7851990274761571   -.5851990274761572 2005
80 "exp"         -1.8052275966951186  -1.9052275966951187  -1.7052275966951185 2005
80 "exp2"         1.3449605617229008   1.2449605617229007   1.4449605617229009 2005
80 "invshare"    -.04047158367738277  -.14047158367738277   .05952841632261723 2005
80 "lnpd"        -1.7120469493082826  -1.8120469493082827  -1.6120469493082825 2005
80 "lnseadis"      .2530643439341663   .15306434393416632    .3530643439341663 2005
80 "male"         -.9791146678759197  -1.0791146678759198   -.8791146678759197 2005
80 "marriage"     1.0423276252242524    .9423276252242524   1.1423276252242525 2005
80 "public"      -1.6001662674475192  -1.7001662674475193  -1.5001662674475191 2005
80 "selfem"       .38705502006783576    .2870550200678358   .48705502006783574 2005
80 "service"      .41040860914150934   .31040860914150936    .5104086091415093 2005
80 "technical"   -1.4264655332959688   -1.526465533295969  -1.3264655332959687 2005
80 "yedu"         -.7900798737208891    -.890079873720889   -.6900798737208891 2005
90 "exp"          -1.899759600423586   -1.999759600423586  -1.7997596004235858 2005
90 "exp2"         .12210533124994319  .022105331249943183    .2221053312499432 2005
90 "invshare"     .16421962648868288   .06421962648868287    .2642196264886829 2005
90 "lnpd"         .14179164523380483  .041791645233804825   .24179164523380484 2005
90 "lnseadis"      -.801743833919848    -.901743833919848   -.7017438339198481 2005
90 "male"         -.9198942098997105  -1.0198942098997106   -.8198942098997105 2005
90 "marriage"     .19116029477242208   .09116029477242207    .2911602947724221 2005
90 "public"      -1.3876187915402305  -1.4876187915402306  -1.2876187915402304 2005
90 "selfem"       -.4570584177383396   -.5570584177383396   -.3570584177383396 2005
90 "service"      -.6558170233711267   -.7558170233711267   -.5558170233711267 2005
90 "technical"    1.5387375190160923   1.4387375190160923   1.6387375190160924 2005
90 "yedu"        -1.2077604453191142  -1.3077604453191143   -1.107760445319114 2005
end

[Andrew Musau]

I think you will have to create an extra graph and suppress everything but the legend. Otherwise, you will have a scaling problem with one graph including a legend and the others not.

local i=1
foreach var in yedu male exp exp2 marriage public technical selfem lnseadis service invshare lnpd{
tw (rarea _lb_ _ub_ q if var=="`var'" & year==2005, astyle(ci) legend(off)  acolor(%10)) ///
   (line _b_ q if var=="`var'" & year==2005, lp(solid) lc(black) lwidth(medthick))     ///
   (line _b_ q if var=="`var'" & year==2017, lp(dash) lc(black) lwidth(medthick))    ///
   (rarea _lb_ _ub_ q if var=="`var'" & year==2017, astyle(ci) legend(off) acolor(%70)) ///
   , ylabel(,grid) legend(off) xtitle("") ytitle("`var'")  xlab(10(10)90) 
graph save `i'.gph,replace
local `i++'
}

tw (rarea _lb_ _ub_ q if var=="`var'" & year==2005, astyle(ci) legend(off)  acolor(%10)) ///
   (line _b_ q if var=="`var'" & year==2005, lp(solid) lc(black) lwidth(medthick))     ///
   (line _b_ q if var=="`var'" & year==2017, lp(dash) lc(black) lwidth(medthick))    ///
   (rarea _lb_ _ub_ q if var=="`var'" & year==2017, astyle(ci) legend(off) acolor(%70)) ///
   , ylabel("") legend(on) xtitle("") ytitle("")  xlab("") plotregion(style(none)) yscale(off) xscale(off)
graph save 13.gph,replace

forvalues i=1/13{
local j `j' `i'.gph
}
graph combine `j', rows(5)  xcommon  b1title(Quantile) xsize(20) ysize(15)

Result:

[Liu Qiang]

I think you will have to create an extra graph and suppress everything but the legend. Otherwise, you will have a scaling problem with one graph including a legend and the others not.

local i=1
foreach var in yedu male exp exp2 marriage public technical selfem lnseadis service invshare lnpd{
tw (rarea _lb_ _ub_ q if var=="`var'" & year==2005, astyle(ci) legend(off) acolor(%10)) ///
(line _b_ q if var=="`var'" & year==2005, lp(solid) lc(black) lwidth(medthick)) ///
(line _b_ q if var=="`var'" & year==2017, lp(dash) lc(black) lwidth(medthick)) ///
(rarea _lb_ _ub_ q if var=="`var'" & year==2017, astyle(ci) legend(off) acolor(%70)) ///
, ylabel(,grid) legend(off) xtitle("") ytitle("`var'") xlab(10(10)90)
graph save `i'.gph,replace
local `i++'
}

tw (rarea _lb_ _ub_ q if var=="`var'" & year==2005, astyle(ci) legend(off) acolor(%10)) ///
(line _b_ q if var=="`var'" & year==2005, lp(solid) lc(black) lwidth(medthick)) ///
(line _b_ q if var=="`var'" & year==2017, lp(dash) lc(black) lwidth(medthick)) ///
(rarea _lb_ _ub_ q if var=="`var'" & year==2017, astyle(ci) legend(off) acolor(%70)) ///
, ylabel("") legend(on) xtitle("") ytitle("") xlab("") plotregion(style(none)) yscale(off) xscale(off)
graph save 13.gph,replace

forvalues i=1/13{
local j `j' `i'.gph
}
graph combine `j', rows(5) xcommon b1title(Quantile) xsize(20) ysize(15)

Result:

[ATTACH=CONFIG]n1499750[/ATTACH]

Thanks for your suggestions. It's very helpful.

[Nicholas Winter]

Another option is to use -grc1leg- (GRaph Combine 1 LEGend), written by Vince Wiggins. Unlike most non-official add-ons, this one is not available from SSC. To install:

net describe grc1leg, from(http://www.stata.com/users/vwiggins)
net install grc1leg.pkg

And then

foreach var in yedu male exp exp2 marriage public technical selfem lnseadis service invshare lnpd {
    di "`var'"
    tw (rarea _lb_ _ub_ q if var=="`var'" & year==2005, astyle(ci) acolor(%10)) ///
        (line _b_ q if var=="`var'" & year==2005, lp(solid) lc(black) lwidth(medthick)) ///
        (line _b_ q if var=="`var'" & year==2017, lp(dash) lc(black) lwidth(medthick)) ///
        (rarea _lb_ _ub_ q if var=="`var'" & year==2017, astyle(ci) acolor(%70)) ///
        , ylabel(,grid) xtitle("") ytitle("") title("`var'") xlab(10(10)90) ///
        name(`var', replace)
    local glist `glist' `var'
}
grc1leg `glist', title("Using graph combine")

Note, however, that you can also get what you want directly using graph's -by()- option:

tw (rarea _lb_ _ub_ q if year==2005, astyle(ci) acolor(%10))  ///
    (line _b_ q if year==2005, lp(solid) lc(black) lwidth(medthick)) ///
    (line _b_ q if year==2017, lp(dash) lc(black) lwidth(medthick))  ///
    (rarea _lb_ _ub_ q if year==2017, astyle(ci)  acolor(%70)) ///
    , ylabel(,grid) legend(off) xtitle("") ytitle("") xlab(10(10)90) ///
    by(var, title("Using by() option"))

[Liu Qiang]

@Nicholas Winter This is super! Thank you for your advice!