how to plot a 2d plot colored map?

Hello

I am trying to creat a 2d plot colored map, I created two for loops for x=vds and y=vgs, and I calculat z=Ids. but all I got is the last calculated value. thank you

Answer 1

[KALYAN ACHARJYA]

Yes,

for vgs=1:1:2
for vds=1:1:2
%....
end
end

As you assigned input gate voltage (vgs) and output drain voltage (vds) in the for loop assignment. During execution it assign a single value only, like 1 or 2, when the loop execution completed it rflects with last value.

See the following example

 >> vgs=1:1:2;
>> disp(vgs)
     1     2

In for loop

for vgs=1:1:2
%code
end 

#Result

>> disp(vgs)
     2

Please go through Matlab Basics

Answer 2

[ikram zdeg]

thank you for your reply.

so I remove For loops. but when I did it, I get another problem of matrix dimensions must agree.

[Image Analyst]

What is the size of all the variables on that line? Are any of them vectors? Are all vectors the same length? Are any higher dimensional arrays? Are they all the same size also? If they're arrays or vectors you will have to use .* instead of * if you want element-by-element multiplication rather than matrix multiplication.

Answer 3

[ikram zdeg]

thank you for your comment, I used .* instead of * and it works without error. but now my first problem isn't solve it yet after deleting For loops.

[Walter Roberson]

Use ./ instead of / in each case.