How do I incorporate meaningful colorbar/colormap in a 2D plot; Having a matrix size [83,25000]

I've a matrix to plot as row vs. column. I've done with the following scripts:

yy = rand(83,25000) ;
x = 1:size(yy,1) ; 
figure
hold on
for i = 1:size(yy,2)
    plot(x,yy(:,i),'.')
end
colorbar

How can I insert a meaningful colorbar? Otherwise, any other ways to plot the matrix with colorbars? Can anybody suggest me. Any suggestion/help is appreciated. Thanks

Answer 1

[KSSV]

yy = rand(83,25000) ;
x = 1:size(yy,1) ; 
y = 1:size(yy,2) ; 

pcolor(x,y,yy') ;
shading interp 
colorbar

[SA]

@KSSVThank you. However, I want to incorporate the colorbar/pcolor as in the pic1.jpg. Your script (pcolor) generates picture like pic2.jpg. How do I create images with dots with colorbar?

[KSSV]

yy = rand(83,25000) ;
x = 1:size(yy,1) ; 
y = 1:size(yy,2) ; 

[X,Y] = meshgrid(x,y) ; 

scatter(X(:),Y(:),yy(:))
colorbar

[SA]

it's a scatter plot but there is no colorbar present. I don't get the colorbar/colormap. y-axis values will be denoted as dots, or if there is more of them by a colormap. with regards, SA

[KSSV]

You will get colorbar with scatter plot as well.

[SA]

This 2D plot suits with me but I can not relate the colormap with the intensity of the dots. scripts are

yy = rand(83, 25000) ;
x = 1:size(yy,1) ;
figure
hold on
colorbar; axis tight;
caxis([.4, 2.3]);
for i = 1:size(yy,2)
    plot(x,yy(:,i),'.')
end

@KSSV, Could you please suggest how can relate the colorbar with the dots in the plot? Thank you.

[KSSV]

Using plot you cannot relate to the colorbar....you have to use scatter. What problem you have to use scatter?

[SA]

With this plot, it is unclear to observe the contribution of x-axis points to the y-axis? I want to check the contribution of every point on axis corresponding to the y-axis (maybe dots with colorbar suit well, but I can not do dots with colorbar). Any help is appreciated.

[SA]

@KSSV, Thanks for your nice support.