How to access values from a multidimensional array with a for loop?

Question

I have created an IF statement tree to give sets of data in arrays a label. The multidimensional array is called featureVectors and numberOfSides, standardDeviationsPerimeter, standardDeviationsAngles(not used in this section of code) and largestAngles are all arrays included in the array. I want to pass all the arrays in featureVectors through the IF statement but it doesn't loop past the first one therefore giving every dataset the label 2. I am not very good at loops with multidimensional arrays.This is my code so far:

for shape in range(0, len(sidesDividedByPerimeter)):
    if numberOfSides[0] == 1:
       labels = 0
    elif numberOfSides[0] > 1 and numberOfSides[0] < 3.5:
       labels = 1
    elif numberOfSides[0] > 3.5:
       if standardDeviationsPerimeter[0] < 0.1458:
           if largestAngles[0] < 104.79:
              labels = 2
           elif largestAngles[0] >= 104.79:
              labels = 3
    elif standardDeviationsPerimeter[0] >= 0.1458:
           labels = 4

    print(featureVectors)
    print(labels)
    #featureVectors[shape].append(labels)

This gives me the output:

I just need it to run through each of the arrays instead of stopping at the first. I know its because of my [0]'s but i just dont know what I should do, im only learning python.

Aries · Accepted Answer · 2017-03-23 14:29:20Z

0

Here shape is the cycling variable that adds with one in each cycling step, but you are not using this variable at all in the cycling body.

I don't quite understand what all your arrays mean, but try to replace all [0] with [shape] and perhaps it will work as you expected.

answered Mar 23, 2017 at 14:29

Aries

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1 Comment

Thom Elliott Over a year ago

if i do that it returns me [2,2,0,0,0], the first 4 values are correct but the 5th should be a 1.

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