scatterplot for matrix output

I would like to display the output of a matrix (40 *46) in a scatter plot. The ouptut is standardised resiudals from -1 to 1. The x axis is age (50 to 95) and the y axis is year (1980 to 2019). Postive residuals are green and negative residuals are red.

Answer 1

[Voss]

M = 2*rand(40,46)-1; % random residuals -1 to 1
ages = 50:95;
years = 1980:2019;

[A,Y] = meshgrid(ages,years);

idx = M > 0;
scatter(A(idx),Y(idx),[],[0 1 0],'filled') % green
hold on
scatter(A(~idx),Y(~idx),[],[1 0 0],'filled') % red

xlabel('Age')
ylabel('Year')