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Cell2Vec

version 1.1.0.0 (10.1 KB) by Jan
Concatenate cell elements to a vector - fast C-Mex

3 Downloads

Updated 03 May 2015

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CELL2VEC - Concatenate cell elements to a vector
V = Cell2Vec(C)
INPUT:
C: Cell array of any size and types:
DOUBLE, SINGLE, (U)INT8/16/32/64, LOGICAL, CHAR.
The elements of C can have different sizes.
OUTPUT:
V: [1 x N] vector of all elements.

EXAMPLE:
C = {1, 2; 3, 4};
V = Cell2Vec(C) % [1, 3, 2, 4] columnwise order
M = reshape(V, size(C)) % [1, 2; 3, 4]

This C-Mex is up to 5 times faster than CAT(C{:}), HORZCAT or CELL2MAT.

Pre-compiled Mex-files can be downloaded: http://www.n-simon.de/mex
Run the unit-test uTest_Cell2Vec after compiling.

Tested: Matlab 6.5, 7.7, 7.8, WinXP, 32bit
Compiler: LCC2.4/3.8, BCC5.5, OWC1.8, MSVC2008
Assumed Compatibility: higher Matlab versions, Mac, Linux, 64bit

See also: CStr2String, CELL2MAT.

Cite As

Jan (2021). Cell2Vec (https://www.mathworks.com/matlabcentral/fileexchange/28916-cell2vec), MATLAB Central File Exchange. Retrieved .

Comments and Ratings (6)

Anton Semechko

Tanmay Rajpathak

rokP

Jan

@Misha, you have to compile the C-file as described in the section "COMPILATION" in the help text - see "help Cell2Vec".

Misha

Hi Jan,
Am I doing something wrong in trying to use this patch? I've dropped it in my main matlab folder. When I try to run:

a =

1 5 9
2 6 10
3 7 11
4 8 12

>> v = cell2vec(a)

i get an error:
Error using Cell2Vec (line 41)
Cannot find Mex file of Cell2Vec

Quant Guy

This is very useful tool and important submission. I was able trivially to reimplement the out of the box implementation of cell2mat which is very slow and got huge increases in overall speed!!

MATLAB Release Compatibility
Created with R2011b
Compatible with any release
Platform Compatibility
Windows macOS Linux

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