Confusion matrix does not plot anything

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

Answer 1

[Walter Roberson]

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

[Jon Camilleri]

Do I have to create a function which reads the data in the elements, or is one already available?

[Walter Roberson]

You appear to have already read the data in using load()