| Author |
 Topic  |
|
|
austin75
USA
8 Posts |
 Posted - 04/22/2011 : 09:41:55 AM
|
Origin Ver. and Service Release (Select Help-->About Origin): 8.0 SR1
Operating System: windows 7
I have experience on c programing (not using it for more than 10 years), but very new to origin c. Here is my question. I have a workbook with several columns, I can click any one column to make it active. Here comes the first question: how to check which column is active in origin c? Next, I will manually create a new column and use the set column value to fill this column based on the previous active column I was choosing with an user defined function called abcfun. Following is the definition of this function in c. Although I can build this function in code builder smoothly, but I can not get it work when I use it in the "set column values" dialogue. Any suggestions will be highly appreciated. Thanks.
// rr is elements in active column
// tt is the value needed for new column
double abcfun(double rr)
{
double x;
double tt;
if (rr>825)
{x=(2*log(rr)-7.6)/1.8; tt=2.9-3.5*x+2.7*x^2;}
else
{x=(2*log(rr)-4.8)/1.0; tt=47.8-62.9*x+48.9*x^2;}
return tt;
} |
|
|
Penn
China
644 Posts |
Posted - 04/24/2011 : 10:15:11 PM
|
Hi,
You can use the GetSelectedColumns method to get the active columns.
After you build the defined function (the one you posted) successfully, you can just use it in the Set Column Values dialog. See the image below:
Penn |
 |
|
|
austin75
USA
8 Posts |
Posted - 04/24/2011 : 10:54:35 PM
|
Thank you Penn.
For this user defined function, do I need to include some additional header file to use log() function? Thanks.
A.S. |
|
|
|
Penn
China
644 Posts |
Posted - 04/25/2011 : 01:19:26 AM
|
Hi A.S.,
When you use the log function, you need to include the origin.h header file. And this header file is included by default when you create the .c file in Code Builder. So, actually, you don't need to include this header file manually.
Penn |
|
|
| |
Topic |
|
|
|
how to use user function to set column value?