Need help with Scatter and colorbar,

Hi! Why is the colorbar unavailable for variable z in a scatter plot?

z are values from 1000 to 4000, and I want a colorbar from those values (matrix 513x1) I've trying with a imagesc(z), get the colorbar and use it; also, I tried with hsv2rgb, etc... but I can't...

Answer 1

[Walter Roberson]

x = randi(25,1,10); y = randi(25,1,10); z = randi([1000,4000],1,10);
scatter(x,y,30,z)    %30 is point size
colorbar

works fine for me.

Answer 2

[Zahra Sharifnezhadazizi]

bins=200;

n = hist3(St,[bins bins]); % Extract histogram data;

% % % default to 10x10 bins

n1 = n';

n1( size(n,1) + 1 ,size(n,2) + 1 ) = 0;

% Generate grid for 2-D projected view of intensities:

% n = EE-EE3;

% n1=n';

xb = linspace(min(dat(:,1)),max(dat(:,1)),size(n,1)+1);

yb = linspace(min(dat(:,2)),max(dat(:,2)),size(n,1)+1);

%Make a pseudocolor plot:

n1(n1<3)=nan;

imagesc(xb,yb,n1); axis xy