spwmatrix gecon

[iris lee]

Hi all,

I want to create a spatial weight matrix using commnd spwmatrix, while I get the error:

Spherical latitudes must be in [-90,90]

Then I put in the command:

sum latitude

However the result is [-36.3,64.1]. I don't figure out why the error happended. This is the data:

* Example generated by -dataex-. To install: ssc install dataex
clear
input double(longitude latitude) int id
            69.11            34.29   1
            19.49            41.18   2
             3.08            36.42   3
            13.15             -8.5   4
              -60            -36.3   5
            44.31             40.1   6
           149.08           -35.15   7
            16.22            48.12   8
            49.56            40.29   9
             50.3             26.1  10
            90.41            23.81  11
             27.3            53.52  12
             4.21            50.51  13
           -88.75            17.25  14
             2.42             6.23  15
            -68.1            -16.2  16
            18.41            43.86  17
            25.57           -24.45  18
           -47.55           -15.47  19
              115             4.52  20
             23.2            42.45  21
            -1.51            12.37  22
            29.18            -3.16  23
           104.55            11.33  24
            11.35              3.5  25
           -75.42            45.27  26
           -23.51            14.93  27
 18.5549222819816 4.39651006534511  28
            14.59             12.1  29
            -70.4           -33.24  30
            116.2            39.55  31
-74.0776064620728 4.71945636042059  32
                .                .  33
                .                .  34
-84.0910297975204 9.92996391640346  35
            15.58             45.5  36
           -82.22            23.08  37
            33.25             35.1  38
 14.4189245589111 50.0939569951817  39
                .                .  40
-5.29590171586637 6.81708459268891  41
-89.2240071966989 13.7023164166501  42
            12.34            55.41  43
             42.2            11.08  44
                .                .  45
           -78.35             -.15  46
            31.14            30.01  47
 8.77898331482706 3.75516325764787  48
            38.55            15.19  49
            24.48            59.22  50
            38.42             9.02  51
            178.3           -18.06  52
            25.03            60.15  53
              2.2             48.5  54
             9.26              .25  55
            -16.4            13.28  56
             44.5            41.43  57
                .                .  58
            13.25             52.3  59
             -.06             5.35  60
            23.46            37.58  61
           -90.22             14.4  62
           -13.49             9.29  63
           -15.45            11.45  64
           -58.12              6.5  65
            -72.2             18.4  66
           -87.14            14.05  67
            19.05            47.29  68
           -21.57             64.1  69
            77.13            28.37  70
           106.49            -6.09  71
             51.3            35.44  72
             44.3             33.2  73
            -6.15            53.21  74
            35.12            31.47  75
            12.29            41.54  76
            -76.5               18  77
 139.771757191407 35.6837804087879  78
            35.52            31.57  79
             71.3             51.1  80
            36.48            -1.17  81
                .                .  82
                .                .  83
 21.1637049395701 42.6552659965988  84
               48             29.3  85
            74.46            42.54  86
           102.36            17.58  87
            24.08            56.53  88
            35.31            33.53  89
             27.3           -29.18  90
           -10.47             6.18  91
 13.1802862985563 32.8955738129876  92
            25.19            54.38  93
             6.09            49.37  94
            47.31           -18.55  95
            33.48              -14  96
           101.41             3.09  97
            -7.55            12.34  98
            14.31            35.54  99
             57.3            -20.1 100
end

Thank you for your advice!

[iris lee]

This is the command:

 spwmatrix gecon latitude longitude, wname(weight) wtype(inv) alpha(1) rowstand

And I find that a small sample of the data can get a result under this command but the whole data can't. There might be some problems in data, but I can't see why.

[Andrew Musau]

In the Stata world, missing is greater than 90. Don't believe it? Ask Stata:

assert 90>=.

Res.:

. assert 90>=.
assertion is false
r(9);

.

So drop missing values and you should be good to go.

[iris lee]

In the Stata world, missing is greater than 90. Don't believe it? Ask Stata:

assert 90>=.

Res.:

. assert 90>=.
assertion is false
r(9);

.

So drop missing values and you should be good to go.

That's it! Thank you so much!