Select column like A(X)-B(Y), C(X)-D(Y), E(X)-F(Y).... Means first set of data in A-B where put 2 thetha in A and intensity in B. Next data in C-D Column, Put 2 theta in Column C and intensity in D . and set Column C as X,.... SO ON ...

You should have scan rate same ... there will b difficulty in concluding the results. scan rate will affect the intensity. sample which have slow scan rate , will show higher intensity.

But if you want to compare only peak position , then its OK. But I will suggest to go far same scan rate and then compare.

@ Chandra Bhal Singh :".... You should have scan rate same ..."

I already mentioned in my question that "....... but with different step size so scan time is not same...".

If you want just to check the peak shifting with respect to 2theta value, you can do as below.

1. Click on import single ASCII icon in origin and select the text document containing x and y values of first set of data.

2. Then plot the graph using plot icon in the window.

3. Again go to import single ASCII icon from the same window and select second set of values from another text document. Graph will automatically plotted. Continue 3rd step for all your data.

4. Click inside the graph and go to analysis-translate-vertical. A cursor with plus sign will appear if you move cursor inside the graph. Single click on any one line and press up arrow, only the selected line will move up.

5. Repeat step 4 for arranging other lines for comparison.

@ Abinaya Kalyanasundaram : I tried this..... it does'nt work.

"3. Again go to import single ASCII icon from the same window and select second set of values from another text document. Graph will automatically plotted. Continue 3rd step for all your data."

By following this step it overwrites and replaces the previous data.

A bit late but could be helpful for someone else.

This problem is very simple to solve. All you have to do is to normalize the intensity of your XRDs. Simply right click on the intensity column and select "Normalize...". A menu will pop up where you can do fine tuning or just click OK. This will normalize your data in certain range (0-1 is standard). Then just plot normalized data the way you like. Here we go.