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Pandas scatter matrix - is an instrument for plotting paired features. For example we have famous data set with Irises. Scatter matrix in this case looks something like this:

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How can I paint Iris Setosa in yellow, Virginica in blue and Versicolour in red?

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You can pass a color vector via the c parameter

iris = datasets.load_iris() df=pd.DataFrame(iris.data) colMap={0:"red",1:"blue",2:"yellow"} cols=list(map(lambda x:colMap.get(x),iris.target)) scatter_matrix(df, diagonal='hist',c=cols)
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