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From: Bryant on 5 Apr 2010 15:15
I need a way to display an image made up of defined x and y coordinates where each (x,y) corresponds to a specific color which is defined in another matrix. So there's a matrix for the x values, a matrix for the y values, and a matrix for the colors.
From: us on 5 Apr 2010 15:17
On Apr 5, 9:15 pm, "Bryant " <rabid_bunn...(a)yahoo.com> wrote:
> I need a way to display an image made up of defined x and y coordinates where each (x,y) corresponds to a specific color which is defined in another matrix. So there's a matrix for the x values, a matrix for the y values, and a matrix for the colors.

a hint:

help scatter;

us
From: ImageAnalyst on 5 Apr 2010 15:52
On Apr 5, 3:15 pm, "Bryant " <rabid_bunn...(a)yahoo.com> wrote:
> I need a way to display an image made up of defined x and y coordinates where each (x,y) corresponds to a specific color which is defined in another matrix. So there's a matrix for the x values, a matrix for the y values, and a matrix for the colors.

----------------------------------
Maybe a for loop, like this untested code:

rows = max(y);
columns = max(x);
rgbImage = zeros(rows, columns, 3);
for k= 1 : length(x)
row = x(k);
col = y(k);
rgbImage(row, col, 1) = colorMatrix(k, 1);
rgbImage(row, col, 2) = colorMatrix(k, 2);
rgbImage(row, col, 3) = colorMatrix(k, 3);
end
imshow(rgbImage);

Of course there may be some pixels that don't get assigned any value
but you would know that from what x's and y's you included.
From: Bryant on 5 Apr 2010 15:53
us <us(a)neurol.unizh.ch> wrote in message <5e01d9a3-38f4-4437-86da-c34c88f41014(a)u22g2000yqf.googlegroups.com>...
> On Apr 5, 9:15 pm, "Bryant " <rabid_bunn...(a)yahoo.com> wrote:
> > I need a way to display an image made up of defined x and y coordinates where each (x,y) corresponds to a specific color which is defined in another matrix. So there's a matrix for the x values, a matrix for the y values, and a matrix for the colors.
>
> a hint:
>
> help scatter;
>
> us

It's supposed to be gridded, like each point is a pixel
From: Steven Lord on 5 Apr 2010 17:59

"Bryant " <rabid_bunnies(a)yahoo.com> wrote in message
news:hpdf31$87g$1(a)fred.mathworks.com...
> us <us(a)neurol.unizh.ch> wrote in message
> <5e01d9a3-38f4-4437-86da-c34c88f41014(a)u22g2000yqf.googlegroups.com>...
>> On Apr 5, 9:15 pm, "Bryant " <rabid_bunn...(a)yahoo.com> wrote:
>> > I need a way to display an image made up of defined x and y coordinates
>> > where each (x,y) corresponds to a specific color which is defined in
>> > another matrix. So there's a matrix for the x values, a matrix for the
>> > y values, and a matrix for the colors.
>>
>> a hint:
>>
>> help scatter;
>>
>> us
>
> It's supposed to be gridded, like each point is a pixel
>

SCATTER can accept any marker specifications PLOT can, and one of the
specifications is 's' for square:

scatter(1:10, 1:10, 's')

Alternately, look at PCOLOR.

--
Steve Lord
slord(a)mathworks.com
comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ


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