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 Topic  |
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Jengo
Germany
13 Posts |
 Posted - 06/25/2010 : 11:13:00 AM
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Origin Ver. and Service Release (Select Help-->About Origin): V8.0988 SR6
Operating System: Win XP
Hey!
I have a problem with Origin. As you can see in the pic I added,
I wanted to use this: mod(Col(B),2*128)-128 to fix my values...
But they generate not the right values.
the original values are in column B(Y) and I need the values marked in the red scope in one column!!
I could fix the first values with mod(Col(B),2*128)-128
But for the next 12 values I needed mod(Col(B),2*-128)+128 to generate the right values.
P.S. I used this modulus in excel and it worked, but not with origin :(
Hope someone can help me!
Thanks
Jengo |
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larry_lan
China
Posts |
Posted - 06/28/2010 : 01:32:04 AM
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Hi Jengo:
This is because different computer language outputs different mod() result:
In C/C++: mod(-72, 256) = -72;
Excel: mod(-72, 256) = 184;
We should not say which one is wrong, they just use different calculation and Origin follows C syntax. As a workaround, you can define a C function and call this function in LabTalk Script window or Set Column Values dialog:
int newmode(int n, int d)
{
int c;
c = n - d*floor((double)n/d);
return c;
}
Thanks
Larry
OriginLab Technical Services |
Edited by - larry_lan on 06/28/2010 09:12:47 AM |
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Jengo
Germany
13 Posts |
Posted - 06/30/2010 : 08:38:50 AM
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I am sorry, but I am still having problem with the set column values dialog:
If I want the correct values in Column (C), which code should I use in that set column values dialog.
I am just a beginner... sorry |
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larry_lan
China
Posts |
Posted - 06/30/2010 : 10:38:00 PM
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Hi:
Maybe you can read our programming help first to see how to create an Origin C function.
Here is a quick start for your issue:
1. Open Code Builder
2. Create a C file.
3. Type the function I provide above, and compile it.
4. Use the function in Set Column Value dialog.
Thanks
Larry |
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Jengo
Germany
13 Posts |
Posted - 07/01/2010 : 05:43:58 AM
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Thank you so much.
And I will follow your advice!
Have a great day! 
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Jengo
Germany
13 Posts |
Posted - 07/26/2010 : 07:42:46 AM
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Hello again:)
I want to adjust the values automatically for all columns with the function you gave me.
If someone have a idea or a link for my problem I would be glad.
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larry_lan
China
Posts |
Posted - 07/26/2010 : 11:55:13 PM
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You can use LabTalk Script to set column values within a loop. Suppose you want to set values from column 2 to the last column, run some script like:
for(int ii=2; ii<=wks.ncols; ii++)
{
col($(ii)) = col(1) + 2;
}
Here is an example about running script in script window.
Thanks
Larry |
Edited by - larry_lan on 07/26/2010 11:55:29 PM |
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Jengo
Germany
13 Posts |
Posted - 07/27/2010 : 09:13:49 AM
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should that code work in the command window as well?! or why does it not work? :(
for(ii=2;ii<wks.ncols; ii++)
{
col($(ii)) = newmode(wcol($(ii)),256)-128);
}
or
loop(ii,2,wks.ncols)
{
col($(ii)) = newmode(wcol($(ii)),256)-128);
}
as you can see above: your/my function was:
int newmode(int n, int d)
{
int c;
c = n - d*floor((double)n/d);
return c;
}
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larry_lan
China
Posts |
Posted - 07/27/2010 : 09:24:12 AM
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quote:
for(ii=2;ii<wks.ncols; ii++)
{
col($(ii)) = newmode(wcol($(ii)),256)-128);
}
or
loop(ii,2,wks.ncols)
{
col($(ii)) = newmode(wcol($(ii)),256)-128);
}
The left and right column are the same, see the above red part.
Larry |
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Jengo
Germany
13 Posts |
Posted - 07/27/2010 : 10:17:54 AM
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aahhh I got it:
this one worked well, seems to be 
loop(ii,1,wks.ncols)
{
col($(ii)) = newmode(wcol(ii),256)-128;
}
Thank YOU! |
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Topic |
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Problems with mod (int x, int y)