How can I scatter two vector with a condition on other vector in a matrix?

If a have this matrix:

A:
X       Y       Z
0       30      100
1       50      200
7       80      500

how could I scatter(Y,Z) with the condition of:

if X=0 then
sz=5;
scatter(Y, Z, sz,'filled','MarkerFaceColor', 'black')
hold on

(we scattered only the Y vs Z values where X>0)

and,

if X>0 then
sz=10;
scatter(d1_10,d1, sz,'filled')

but the color of the points would be printed following a colormap and display on the graph a colorbar

any idea about how to make it?

Answer 1

[AJ Geiger]

 sz = zeros(size(A,1),1);
 %
 % Note A must be 0 or greater-than 10 according
 % to your logic, and therefore if x equals
 % seven should be specified.
 %
 sz(A(:,1) == 0) = 5;
 sz(A(:,1) > 10) = 10;
 %
 % follow the same logic for setting colors
 % how ever you can not use the word 'black'
 %
 color = zeros(size(A,1),3);
 color (A(:,1) == 0,:) = [.5,.5,.65];
 color (A(:,1) > 10,:) = [0,0,0]; 
 %
 % note: the default color is
 % black and is therefore redundent
 %
 scatter(Y, Z, sz,'filled','MarkerFaceColor',color)