*.dat file is the best. Do you know how to create it?

no I do not know how can you show how

open notepad. First line you should write theta min, step and theta max.

Then second line is for intensity of first theta. Third line for intensity of second theta and ... . 

example:

25.00   0.02    74.98   

4214.53

4216.75

4218.20

.

.

.

After saving the *.txt file you can rename it to *.dat. 

In fact, WinPLOTR can use a lot of formats, including dat, xy, xrdml, gsas... First you need to know the format of your experimental file. If it cannot be opened by WinPLOTR directly, you can convert it with ConvX or PowDLL into acceptable one.

The format shown by Masoud Shajahani is ok. But ymake sure for extension as ".dat".  Also check it once by opening it in the notepad. We have to give the same name in pcr file then it can open this file automatically.

Hello everyone ! I have changed the extension of my ".txt" file to ".dat" but still facing to insert in High Score Plus for analysis. Please help...