Arcobjects ClassBreaks property retuning wierd values

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05-21-2015 12:37 PM
Marcus_V_DSilva
New Contributor

I'm using IClassifyGEN method Classify and its the property ClassBreaks. The inputs for the method are ok (please see below) but the ClassBreaks are resulting wierd values.

values:  (1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0, 13.0, 14.0, 15.0, 16.0, 17.0, 18.0, 19.0, 20.0, 21.0, 22.0, 23.0, 24.0, 25.0, 26.0, 27.0, 28.0, 29.0, 30.0, 31.0, 32.0, 33.0, 34.0, 35.0, 36.0, 37.0, 38.0, 39.0, 40.0, 41.0, 42.0, 43.0, 44.0, 45.0, 46.0, 47.0, 48.0, 49.0, 50.0, 51.0, 52.0, 53.0, 54.0, 55.0, 56.0, 57.0, 58.0, 59.0, 60.0, 61.0, 62.0, 63.0, 64.0, 65.0, 66.0, 67.0, 68.0, 69.0, 70.0, 71.0, 72.0, 73.0, 74.0, 75.0, 76.0, 77.0, 78.0, 79.0, 80.0, 81.0, 82.0, 83.0, 84.0, 85.0, 86.0, 87.0, 88.0, 89.0, 90.0, 91.0, 92.0, 93.0, 94.0, 95.0, 96.0, 97.0, 98.0, 99.0, 100.0, 101.0, 102.0, 103.0, 104.0, 105.0, 106.0, 107.0, 108.0, 109.0, 110.0, 111.0, 112.0, 113.0, 114.0, 115.0, 116.0, 117.0, 118.0, 119.0, 120.0, 121.0, 122.0, 123.0, 124.0, 125.0, 126.0, 127.0, 128.0, 129.0, 130.0, 131.0, 132.0, 133.0, 134.0, 135.0, 136.0, 137.0, 138.0, 139.0, 140.0, 141.0, 142.0, 143.0, 144.0, 145.0, 146.0, 147.0, 148.0, 149.0, 150.0, 151.0, 152.0, 153.0, 154.0, 155.0, 156.0, 157.0, 158.0, 159.0, 160.0, 161.0, 162.0, 163.0, 164.0, 165.0, 166.0, 167.0, 168.0, 169.0, 170.0, 171.0, 172.0, 173.0, 174.0, 175.0, 176.0, 177.0, 178.0, 179.0, 180.0, 181.0, 182.0, 183.0, 184.0, 185.0, 186.0, 187.0, 188.0, 189.0, 190.0, 191.0, 192.0, 193.0, 194.0, 195.0, 196.0, 197.0, 198.0, 199.0, 200.0, 201.0, 202.0, 203.0, 204.0, 205.0, 206.0, 207.0, 208.0, 209.0, 210.0, 211.0, 212.0, 213.0, 214.0, 215.0, 216.0, 217.0)

frequency:  (1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1)

breaks: 3

For instance for 3 breaks, I'm getting [0, 36, 72, 0]. The first one (0) is the minimum value and is ok, the second and the third ones (fisrt two breaks values) are also ok, but the last value is ruturning 0 where it should be a value greater than 72. If I increse the number of breaks to 5 the I get [0, 0, 43, 65, 0, 0]

Can anybody tell me what I'm doing wrong?

Thansk in advance

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Here is par of my code

pMap = mxdObject.Map(0)

pFLayer = pMap.Layer[0]

pGeoFeat = CType(pFLayer, esriCarto.IGeoFeatureLayer)

pFclass = pGeoFeat

pClassify = NewObj(esriSystem.NaturalBreaks, esriSystem.IClassifyGEN)

pRendererClassBreak = NewObj(esriCarto.ClassBreaksRenderer, esriCarto.IClassBreaksRenderer)

pTable = pFclass

pTableHistogram = NewObj(esriCartoUI.TableHistogram, esriCarto.ITableHistogram)

pHistogram = pTableHistogram

pHistogram = CType(pHistogram, esriCartoUI.IHistogram)

pTableHistogram.Field = nomeparametro     

pTableHistogram.Table = pTable

dadosHistograma = pHistogram.GetHistogram()

print 'valores: ', dadosHistograma[0]

print 'frequen: ', dadosHistograma[1]

quebras = '5' #breaks

pClassify.Classify(dadosHistograma[0],  dadosHistograma[1], int(quebras))

cb = pClassify.ClassBreaks

for it in cb:

    print round(it,6)

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Marcus_V_DSilva
New Contributor

I'm sorry, but actually when I said 0 one sholud read 2.47032822921e-323 that meaning:

[2.47032822921e-323, 36.0, 72.0, 2.47032822921e-323] instead of [0, 36, 72, 0].

Thanks,

msilva(Marcus)

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