[s.m]

Originally Posted by wyldckat

Greetings s.m,

I guess that this thread is a bit confusing, but most of the necessary information is already present.
I'll try to list the steps you need to perform:

1. Have the 3 VTK files open in the same ParaView.
2. Apply one "Calculator" filter to each one of the VTK files on the "Pipeline Browser".
3. On each "Calculator" filter, indicate that you want the Result array to be named "Cp1" for the first file, "Cp2" for the second file and "Cp3" for the third file. If you prefer, you can give it any other names to each one.
4. And on each "Calculator" filter, indicate that you want the Expression to be always "Cp" or whichever name your field is.
5. Click on the "Apply" button for each "Calculator" filter.
6. Now select the 3 "Calculator" filters (keep the Ctrl key pressed down, while you click on each filter entry in the "Pipeline Browser").
7. Now apply the filter "Group Datasets".
8. Now apply the plot filter to the "Group Datasets" entry on the "Pipeline Browser".
9. And have a look at the post #22 for ideas on how to control the data sets to be plotted.

Best regards,
Bruno

sorry i don't know how should i apply them group datasetsacually i don't know how should do the 7th step.
thank you again
p.s: i attached a picture that i do till 6th step.

[s.m]

i do the 7th step in they way that pictures show, if i did it wrong please tell me, thank you

[s.m]

i do the 8th step in they way that pictures show, when i execute "plotOnIntersectionCurves" i doesn't show the grouph dataset that i can plot three VTK files togother, what should i do now?
thank you very much.

[wyldckat]

Sorry, I didn't test this myself first. And many thanks for the snapshots, because this way I was able to see what you were seeing on your side!

The solution is that instead of using the filter "Group Datasets", you should use the filter "Append Attributes". I will edit the previous post in accordance to this finding, to make it easier for future forum readers.

The explanation: this is because the "Group Datasets" does not merge the datasets into a single one, it only groups them into blocks, allowing for a joint filter application to all; this doesn't even need the datasets to have the same data structure.
But the "Append Attributes" does merge the data arrays into the same block, but this demands that the data structures are similar enough.

[s.m]

Originally Posted by wyldckat

Sorry, I didn't test this myself first. And many thanks for the snapshots, because this way I was able to see what you were seeing on your side!

The solution is that instead of using the filter "Group Datasets", you should use the filter "Append Attributes". I will edit the previous post in accordance to this finding, to make it easier for future forum readers.

The explanation: this is because the "Group Datasets" does not merge the datasets into a single one, it only groups them into blocks, allowing for a joint filter application to all; this doesn't even need the datasets to have the same data structure.
But the "Append Attributes" does merge the data arrays into the same block, but this demands that the data structures are similar enough.

Yes, i can do it right, thank you very much dear bruno.

i want to comparison this 3 curve with experiment too,acutally
i have the data points (x, y) for experiment, how can i import this point to paraview and how can i draw it in the same picture that these three curves is.
can you please explain it too, thank you again

[wyldckat]

Originally Posted by s.m

i want to comparison this 3 curve with experiment too,acutally
i have the data points (x, y) for experiment, how can i import this point to paraview and how can i draw it in the same picture that these three curves is.

Well, it might depend if the number of data points in your experimental data, is the same as the data points on your simulation.

Either way, try these steps:

1. Load the experimental data into ParaView. If you do not have any specific format, then use a CSV file: http://en.wikipedia.org/wiki/Comma-separated_values
2. Now use the "Plot Data" filter on the experimental data, so that you can check if you're able to plot it in ParaView.
3. Now, this may seem weird, but select the two plots in the "Pipeline Browser", namely the plot entry you have from the simulation data and the plot you've just done with the experimental data. And apply to this selection the "Append Attributes" filter.
4. If it works well, it will give you a merged data set, with both the simulation and experimental data.
5. Now apply the filter "Plot Data" onto the latest merged data, so that you can now plot all of the desired line plots.

Best regards,
Bruno

[s.m]

Originally Posted by wyldckat

Well, it might depend if the number of data points in your experimental data, is the same as the data points on your simulation.

Either way, try these steps:

1. Load the experimental data into ParaView. If you do not have any specific format, then use a CSV file: http://en.wikipedia.org/wiki/Comma-separated_values
2. Now use the "Plot Data" filter on the experimental data, so that you can check if you're able to plot it in ParaView.
3. Now, this may seem weird, but select the two plots in the "Pipeline Browser", namely the plot entry you have from the simulation data and the plot you've just done with the experimental data. And apply to this selection the "Append Attributes" filter.
4. If it works well, it will give you a merged data set, with both the simulation and experimental data.
5. Now apply the filter "Plot Data" onto the latest merged data, so that you can now plot all of the desired line plots.

Best regards,
Bruno

dear Bruno, i also can plot the experiment data with our helpful explenation, thank you very much.