Re: using variable with "add" function

Posted by Michael Schmid on Jun 24, 2009; 4:16pm
URL: http://imagej.273.s1.nabble.com/using-variable-with-add-function-tp3692029p3692032.html

Hi,

there is one more error in your macro that I did not notice before  
(sorry).
It should be
   run("Add...", "value="+mean);

You can see this if you run the Macro Recorder, it will record, e.g.
   run("Add...", "value=2");

If you have a variable, use the '+' operator for string  
concatenations; numbers will be automatically converted to strings.

Michael
________________________________________________________________

On 24 Jun 2009, at 18:02, Ka Wai Tse wrote:

> Thanks for the tips. i revised it to this... but still doesn't work.
>
> n = getSliceNumber();
>       for (i=1; i<=nSlices; i++) {
>           setSlice(i);
>           makeRectangle(3, 0, 93, 315);
>           getRawStatistics(nPixels, mean);
>           p= 5.0000 - mean;
>           print(p);
>           makeRectangle(0, 0, 816, 1088);
>           run("Add...",p);
>       }
>
> explanation:
> the following is for applying my commands to all the images in my  
> stack
>
> n = getSliceNumber();
>       for (i=1; i<=nSlices; i++) {
>           setSlice(i);
>
> the following is to get the mean value of the square created in my  
> image:
> makeRectangle(3, 0, 93, 315);
> getRawStatistics(nPixels, mean);
>
> the following is to add "5-mean" to the entire image....I printed p  
> to make sure it's adding the correct value.
>
>           p= 5.0000 - mean;
>           print(p);
>           makeRectangle(0, 0, 816, 1088);
>           run("Add...",p);
>
> I find it to print the correct p but doesn't add it. It adds a  
> constant 25 to all my images.
>
> Any ideas?
>
> ----- Original Message -----
> From: Michael Schmid <[hidden email]>
> Date: Wednesday, June 24, 2009 1:33 am
> Subject: Re: using variable with "add" function
> To: [hidden email]
>
>> Hi,
>>
>> it should be
>>   getStatistics(area, mean, min, max, std, histogram)
>> or
>>   getStatistics(area, mean)
>>
>> Your macro will assigne the area to the 'mean' variable - it seems
>> that the area of your images (in calibrated units) was almost zero...
>>
>> By the way, since the "Add..." function works on raw (uncalibrated)
>>
>> pixel values, it would be better to use
>>   getRawStatistics(nPixels, mean);
>>
>> Otherwise the macro won't work correctly for images with pixel
>> value
>> calibration.
>>
>> Michael
>> ________________________________________________________________
>>
>>
>> On 24 Jun 2009, at 02:05, Ka Wai Tse wrote:
>>
>>> Hi all,
>>> I'm trying to add a value (p) to each of the images in my stack.
>>> This value
>>> (p) changes for each picture according to the function p= 5-mean.
>>
>>> When i run
>>> the following code below, it runs but i find it to add "5" to all
>>
>>> of my
>>> images not "5-mean" whatever "mean" is for that particular image.
>>
>>> Any idea
>>> why it's doing this?
>>>
>>> getStatistics (mean);
>>> y=mean;
>>> p= 5.0000 - mean;
>>> run("Add...", + p +);
>>