Thanks for the reply. But I think I need to explain my problem a bit better.
I have one sample and I run this sample on two instruments. Each instrument will give me the results in a x-y dataset. The x-value will give me the property measured on each instrument and the y value is the signal intensity of the corresponding detector. I am now trying to put the results from both instruments together in one plot (since the describe the same sample. (To make this all more complicated, I actually have 8 samples that belong to one batch and I like to present all 8 samples in the same plot. I guess this is were the contour plot comes into play.) I have seen that these type of results are often presented in a contour plot. I hope this a little clearer now and if now please let me now. I am pretty sure there is a way to do this on Origin and somebody must know how.
It is possible to show multiple sets of Y data in a 3 dimensional cross-section using Plot: 3D: XYY format. I prefer the waterfall plot. To create this you will need to have all of the Y data with a common time base. You can also forgo the time and place all of the data in a worksheet with no X column data. Origin will then plot using the row numbers. Once the data is in a worksheet select all of the Y columns and then select from the main Origin Menu Plot: 3D XYY: 3D Waterfall… You can also try the 3D Wall option. By adjusting the spacing between the datasets, you can get a fairly nice representation of the top contour of all the datasets combines. Select Format: Plot: Spacing tab… and select Gap between walls 0%.
If you want a true 3D representation, you will need to move the Y data into a matrix. This again will only work if there is a common X value or step between the Y datasets. To start the conversion, make sure that all of the Y data is in a single worksheet with NO X column. You will then select from the main Origin menu Edit: Convert to Matrix: Direct… This will move each Y dataset into its own column in the Matrix. By selecting Plot 3D: Color Map Surface, Origin will create a surface by interpolation of the data between the datasets. If this does not display the data to your liking, you should try sending your data to OriginLab technical support.
Contour plot of 2 xy data sets
Posted - 08/10/2001 : 1:31:14 PM
