Plotting a data from a matrix

Hi I have a matrix where there are 11 rows and 198 columns. The values range between -1 to +1. I would like to plot the values (1 to 198 on x axis and 11 (random 11 sets)) in such a way that the positive values get red colour and the negative values get blue colour. How do I go about it? Thanks

Answer 1

[Walter Roberson]

colidx = 1 + (YourMatrix >= 0);

surf(YourMatrix, colidx);
colormap([0 0 1; 1 0 0]);  %blue; red

If you are thinking of a line plot then you need to define what should happen for lines that go between positive and negative points. You might want

mesh(YourMatrix, colidx);

[Suchetana Gupta]

@Walter I am not looking for this. What I am looking for is something like what I have attached in the image.