px4MATFilestitcher

Combine multiple MAT-files retrieved from SD card into a single MAT-file

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    Add-On Required: This feature requires the UAV Toolbox Support Package for PX4 Autopilots add-on.

    Syntax

    px4MATFilestitcher()
    px4MATFilestitcher(folderpath)

    Description

    px4MATFilestitcher() combines all MAT-files, starting with the same file name in the current folder in MATLAB®, into a single MAT-file. The function identifies the first part of the file name that is common for a specific run, and then combine those files in the order determined by the numeric characters present at the end of their file names.

    example

    px4MATFilestitcher(folderpath) combines all MAT-files, starting with the same file name in the folder specified using the full folder path. The function identifies the first part of the file name that is common for a specific run, and then combine those files in the order determined by the numeric characters present at the end of their file names.

    example

    Examples

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    Combine all MAT-files that start with the same file name (part of the same run) in the current folder in MATLAB.

    Consider that the file name of the MAT-files start with px4_squarepath_sdcard and that there are nine MAT-files in the current folder in MATLAB, which correspond to three runs, as listed below. 

    px4_squarepath_sdcard_1_1.mat
px4_squarepath_sdcard_1_2.mat
px4_squarepath_sdcard_1_3.mat
px4_squarepath_sdcard_2_1.mat
px4_squarepath_sdcard_2_2.mat
px4_squarepath_sdcard_2_3.mat
px4_squarepath_sdcard_3_1.mat
px4_squarepath_sdcard_3_2.mat
px4_squarepath_sdcard_3_3.mat

    To combine the files, enter the following command at the MATLAB command prompt:

    px4MATFilestitcher()

    The files are combined based on the run (the suffix after the file name) to generate three stitched files:

    px4_squarepath_sdcard_1_stitched.mat
px4_squarepath_sdcard_2_stitched.mat
px4_squarepath_sdcard_3_stitched.mat

    For example, all data points logged in px4_squarepath_sdcard_1_1.mat , px4_squarepath_sdcard_1_2.mat , and px4_squarepath_sdcard_1_3.mat are copied to the combined file - px4_squarepath_sdcard_1_stitched.mat .

    Combine all MAT-files that start with the same file name (part of the same run) in any folder that you specify.

    Consider that there is a folder named Today_Runs inside the current folder in MATLAB. The file name of the MAT-files in Today_Runs start with px4_squarepath_sdcard and that there are nine MAT-files in the current folder in MATLAB, which correspond to three runs, as listed below. 

    px4_squarepath_sdcard_23_1.mat
px4_squarepath_sdcard_23_2.mat
px4_squarepath_sdcard_23_3.mat
px4_squarepath_sdcard_24_1.mat
px4_squarepath_sdcard_24_2.mat
px4_squarepath_sdcard_24_3.mat
px4_squarepath_sdcard_25_1.mat
px4_squarepath_sdcard_25_2.mat
px4_squarepath_sdcard_25_3.mat

    To combine the files, enter the following command at the MATLAB command prompt:

    px4MATFilestitcher(fullfile(pwd,'Today_Runs'))

    The files are combined based on the run (the suffix after the file name) to generate three stitched files:

    px4_squarepath_sdcard_23_stitched.mat
px4_squarepath_sdcard_24_stitched.mat
px4_squarepath_sdcard_25_stitched.mat

    If the folder Today_Runs is present in a different path other than inside the current folder in MATLAB, specify the full path to combine the files. For example:

    px4MATFilestitcher('C:\User\Autopilot\matfiles\Today_Runs')

    Note

    However, in this case (the folder present in a different path other than inside the current folder in MATLAB), the stitched files are always generated in the current folder in MATLAB.

    Input Arguments

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    Absolute path of the folder in the host computer, which contains the MAT-files (which were retrieved from the SD card) that need to be combined.

    Data Types: char | string

    Version History

    Introduced in R2020b