A question about usage of ndgrid

Hello,

I am relatively new to MATLAB so would like to know if there is a way to invoke the ndgrid function with a set of values rather than a range, as specified in the documentation? For instance, if I had to plot five dimensions with five values like 0.5 0.3 0.675 0.987 0.1100, would I be able to do it with ndgrid? Alternatively, is there any other MATLAB function that could help me to generate a grid plot for n random data dimensions?

Greatly appreciate your thoughts.

TIA Vinod

Answer 1

[Walter Roberson]

Yes, no problem. ndgrid does not ever really take ranges: the examples you look at are using operators that create sets of values from ranges and pass those sets into ndgrid.

[A, B, C, D, E] = ndgrid([0.5 0.3 0.675 0.987 0.1100]);

[Vinod]

thanks for the answer. Can I pass all the elements of the resultant grid array in your example above, [A, B, C, D, E], to the mesh function? I am unable to figure this out since in the documentation, I see that only three arguments are passed to mesh() after the processing by ndgrid:

http://www.mathworks.com.au/help/matlab/ref/ndgrid.html?searchHighlight=ndgrid

Would you be able to clarify this doubt of mine?

TIA

Vinod

[Walter Roberson]

How do you want the 4th and 5th dimensions to be represented on the plot? Use color for the 4th dimension, and time (animation) for the 5th dimension?

[Vinod]

thanks. color should be fine, but animation may not be an option. The plots would be sent to a publication. Even I am not sure about color, as it may not appear on b/w printouts. is there any other way to bring to the fore all the dimensions without using either color or animation? I would prefer using directional coordinates if that is an option at all, but I also understand that then the plot might be restricted to 3 dimensions. I have already plotted something using surf(), but in this case I had to do away with certain aspects of the simulation results so as to reduce it to three dimensions.

Vinod