| T O P I C R E V I E W |
| jordai |
Posted - 06/02/2013 : 8:47:36 PM
Origin Ver. and Service Release (Select Help-->About Origin): 8.6
Operating System: Windows
Hi,
In a 2D scatter graph I would like to use personalized colours using RGB codes instead of the proposed by Origin. However I don't 100% understand the procedure. Do I have to create a column with the colour code?
All the iformation I've found about that topic is this:
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An RGB composite value is computed from triplet components of Red, Green, and Blue. The R, G, and B component values range from 0 to 255.
RGB composite = (2560 * R) + (2561 * G) + (2562 * B)
... which is equivalent to...
RGB composite = R + (256 * G) + (65536 * B)
To use this option:
Double-click on the data plot that you wish to modify. This opens the Plot Details dialog box.
Select the Symbol tab, Pattern tab, etc.
Click the Symbol Color button and select Direct RGB: Dataset, where Dataset contains the RGB composite values
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1) if RGB are coded from 0 to 255, what is the 256 and the respective exponential?
2) what is the final number I have to enter in the column?
Thanks in advance for the answer.
Cheers,
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| 6 L A T E S T R E P L I E S (Newest First) |
| Pls_help_me |
Posted - 07/08/2014 : 10:23:19 AM
Hello an thank you for your replies and support,
i have finally made it to solve my problem. My final code looks like this:
newbook mat:=1; //new matrix
impimage; //import of images
%A=%H; //saveing the name of the matrix as %A
//loop over all objects in the matrix
for(int i = 1; i <= 14; i++) //must be adapted to needs
{
window -a %A; //activate matrix
wks.active=i; //activate object in matrix
matrix -ii 0; //switch to data mode
m2w method:=xyz; //converting matrix to worksheet
discfreqs -r 1 irng:=[%H]1!3; //calculating counts
// three new columns
wks.addcol();
wks.addcol();
wks.addcol();
// set names as R/G/B
col(3)[L]$ = "R";
col(4)[L]$ = "G";
col(5)[L]$ = "B";
// converting worksheet values to original RGB values
csetvalue col:=col(5) formula:="int(col(1)/(256*256))" recalculate:=1;
csetvalue col:=col(4) formula:="int((col(1) - 256 * 256 * col(5))/256)" recalculate:=1;
csetvalue col:=col(3) formula:="col(1)-256*col(4)-256*256*col(5)" recalculate:=1;
//new columns for deriving percentage with black
//calculating how many pixels in total
wks.addcol();
col(6)[L]$ = "% mit schwarz";
csetvalue col:=col(6) formula:="col(2)*100/(Max(sum(col(2))))" recalculate:=1;
//percentage without black
wks.addcol();
range r1 = Col(2)[1:1]; //define cell with the counts of black
col(7)[L]$ = "% ohne schwarz"; //set name
csetvalue col:=col(7) formula:="col(2)*100/(Max(sum(col(2)))-r1)" recalculate:=1; //calculate %
}
Definitley not an elegant solution but it works for my purpose. Thank you,
Best regards
Raphael
Just my signature... |
| snowli |
Posted - 06/05/2013 : 10:12:03 AM
You are using Origin 8.6 SR0. We already recommend people to patch to latest SR version since we release multiple patches to fix bugs, etc.
So could you choose Help: Check for Updates to patch to latest 8.6 SR3.
You will need to run Help: Check for Updates multiple times to patch from sr0 to sr1 and then to sr2 and then to sr3.
Thanks, Snow Li
OriginLab Corp. |
| jordai |
Posted - 06/04/2013 : 6:55:56 PM
There is the option "auto", but it sets the colour to black, independently the colour of the symbol. I'm using 8.6.0 (64-bit) b70 (Academic).
What's the SR3? this version might be slightly different than mine maybe?
Regards,
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| snowli |
Posted - 06/04/2013 : 12:12:08 PM
Hi Jordai,
It should work.
If you double click the error bar to open Plot Details dialog. The color should be auto which means it will follow the symbol color.
I tried in 8.6 SR3 and it works.
E.g.
Thanks, Snow Li
OriginLab Corp. |
| jordai |
Posted - 06/03/2013 : 9:28:56 PM
Thanks Snow Li, it did work.
However, my symbols have error bars, and it seems the RGB is not an option for the colour bars. Is that true or there is a way to have the same RGB colour for the error bar like the symbols?
Regards,
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| snowli |
Posted - 06/03/2013 : 12:25:54 PM
Hello,
Your understanding is correct. You need to create a column with RGB calculated composite values. We use
RGB composite = R + (256 * G) + (65536 * B)
to computer the RGB composite value.
We have a Labtalk function color(R, G, B) to calculate it as well.
Then as you said specify Symbol color to be Direct RGB: and specify which column value to use.
http://www.originlab.com/www/helponline/origin/en/UserGuide/Using_a_Dataset_to_Control_Plot_Color.html#Direct_RGB
Thanks, Snow Li
OriginLab Corp.
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