Ah! I thought that the origin is a color image. In this case, this
code maybe usefull :

% Normalize between 0 and 255 :
y = data - min(min(data));
z = y/max(max(y))*255;
s = uint8(z); % Change to integer unit
% Save :
imwrite(s,'test2.jpg','jpg')

Hope it work! ;)

--- In m..., "trafton_d" wrote:
>
> The rgb2gay function does not work. I get back an error that says:
> "??? Error using ==> rgb2gray>parse_inputs
> MAP must be a m x 3 array.
>
> Error in ==> rgb2gray at 35
> X = parse_inputs(varargin{:});
> "
> The thing i'm trying to convert is just a 200x200 matrix full of
> values between 5.5 and -4.9.
> thanks again.
> --- In m..., "trungk46da" wrote:
> >
> > Hi,
> > I'm not sure if there's an option like this for imwrite function. But
> > maybe you can use the function rgb2gray() to convert the image to
> > grayscale before exporting it.
> >
> > --- In m..., "trafton_d" wrote:
> > >
> > > Hi.
> > > I'm just starting to use matlab to make stimuli so this is a very
> > > basic question. I have used matlab to create a gaussian image
and now
> > > i want to export it. the progblem is that if i use the imwrite
> command:
> > > >>imwrite(ans, 'pic2.jpg');
> > > The resultant output is BW and i need it to be grayscale. How do i
> > > output in grayscale?
> > > thanks for the help.
> > > t
> > >
> Start a New Thread

Hi;
What do you mean with the gaussian image, i don't understant exactly anyway. But you may try to set colormap to grey.
Does it help?(If you can sent a piece of m code, may help more)
Regards Start a New Thread

The rgb2gay function does not work. I get back an error that says:
"??? Error using ==> rgb2gray>parse_inputs
MAP must be a m x 3 array.

Error in ==> rgb2gray at 35
X = parse_inputs(varargin{:});
"
The thing i'm trying to convert is just a 200x200 matrix full of
values between 5.5 and -4.9.
thanks again.
--- In m..., "trungk46da" wrote:
>
> Hi,
> I'm not sure if there's an option like this for imwrite function. But
> maybe you can use the function rgb2gray() to convert the image to
> grayscale before exporting it.
>
> --- In m..., "trafton_d" wrote:
> >
> > Hi.
> > I'm just starting to use matlab to make stimuli so this is a very
> > basic question. I have used matlab to create a gaussian image and now
> > i want to export it. the progblem is that if i use the imwrite
command:
> > >>imwrite(ans, 'pic2.jpg');
> > The resultant output is BW and i need it to be grayscale. How do i
> > output in grayscale?
> > thanks for the help.
> > t
> Start a New Thread

Hi,
I'm not sure if there's an option like this for imwrite function. But
maybe you can use the function rgb2gray() to convert the image to
grayscale before exporting it.

--- In m..., "trafton_d" wrote:
>
> Hi.
> I'm just starting to use matlab to make stimuli so this is a very
> basic question. I have used matlab to create a gaussian image and now
> i want to export it. the progblem is that if i use the imwrite command:
> >>imwrite(ans, 'pic2.jpg');
> The resultant output is BW and i need it to be grayscale. How do i
> output in grayscale?
> thanks for the help.
> t
> Start a New Thread

Hi.
I'm just starting to use matlab to make stimuli so this is a very
basic question. I have used matlab to create a gaussian image and now
i want to export it. the progblem is that if i use the imwrite command:
>>imwrite(ans, 'pic2.jpg');
The resultant output is BW and i need it to be grayscale. How do i
output in grayscale?
thanks for the help.
t Start a New Thread