Python matplotlib scatter - different markers in one scatter

Question

I want to display some points. Here is my code:

plt.scatter(y[:,0],y[:,1],c=col)
plt.show()

And as col I have:

Col:  [1 1 0 1 1 1 1 0 0 0 1 0 0 0 0 0 0 1 1 1 0 0 1 1 0 0 0 0 1 1 0 1 1 0 0 0 0
 0 0 0 0 0 0 0 1 1 0 1 1 0 1 0 0 1 0 1 1 0 1 0 1 0 0 1 1 1 1 1 1 1 1 1 0 0
 1 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 0 1 0 0 1 1 0 1 0 0]

So I have points in two different colours. But I also want to have two different markers. How can I do it? markers=col gives an error.

Answer 1

You can use one scatter plot per marker.

markers = ["s","o"]
for i, c in enumerate(np.unique(col)):
    plt.scatter(y[:,0][col==c],y[:,1][col==c],c=col[col==c], marker=markers[i])

For a way to use several markers in a single scatter plot, see this answer.

Answer 2

Matplotlib does not support different markers in one call to scatter. You'll have to use two different calls to scatter; for example:

plt.scatter(y[col == 0, 0], y[col == 0, 1], marker='o')
plt.scatter(y[col == 1, 0], y[col == 1, 1], marker='+')