Confusion matrix does not plot anything

2015 11 15
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更新时间：2015 11 15
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I am trying to sort out a little algorithm, based on false positive and true positive for my school project, however in my little world, I am still slightly stuck.
1. Load a data set - http://archive.ics.uci.edu/ml/datasets/Iris
addpath ('..')
load('iris-data.csv')
m = iris_data
I try this
plot(nmz(m)), and, this shows an empty graph.
I do not think I will be able to feel satisfied with an empty graph.
See confusion matrix - https://en.wikipedia.org/wiki/Confusion_matrix

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Walter Roberson
Walter Roberson 2015-11-15

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MATLAB does not have a function named nmz() . It does have a function named nnz, number of non-zeros, but that just tells you how many of the values in the array were not equal to 0, which is going to be a scalar value that you are not going to want to plot.
If you have the Statistics Toolbox then you should use http://www.mathworks.com/help/stats/confusionmat.html

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Jon Camilleri
Jon Camilleri 2015-11-15
Do I have to create a function which reads the data in the elements, or is one already available?
Walter Roberson
Walter Roberson 2015-11-15
You appear to have already read the data in using load()

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