Structure Cut

Utility function that applies the same cut to specified elements of a structure.
Updated 18 Oct 2010

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As an example, suppose you had taken 155 seconds of data of the location (x,y,z) of a particle as a function of time (t). It is convenient to put that all into a struct, such as this one:

>> data

data =

t: [155000x1 double]
x: [155000x1 double]
y: [155000x1 double]
z: [155000x1 double]

If you wanted to extract the data taken between 15 and 20 seconds, you would normally need to type

index = find((data.t > 15) & (data.t < 20));
cut_data.t = data.t(index);
cut_data.x = data.x(index);
cut_data.y = data.y(index);
cut_data.z = data.z(index);

Tedious, and prone to typos! Using the function "struct_cut" you can do the same thing by just typing

index = find((data.t > 15) & (data.t < 20));
cut_data = struct_cut(data,{'t','x','y','z'},index);

If you want to apply different cuts to each element of the structure, just type

cut_data = struct_cut(data,{'t','x','y','z'},{i_t,i_x,i_y,i_z});

where "i_t", "i_x", etc are four different cut arrays you make elsewhere.

I tested this with ~10-100 megabyte data sets, and it runs really fast. Hopefully it will work well for larger arrays also, please let me know!

Cite As

Sean Bryan (2024). Structure Cut (, MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2010b
Compatible with any release
Platform Compatibility
Windows macOS Linux
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