Efficiency loading a file into Matlab
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I am trying to load a file in Matlab. But I am a bit confused about the best way to do it.
The file has 3 columns and looks like the screenshot below:

This file I can load very quickly by doing `load('c')`.
However, I had to add 2 NaNs on the bottom row.
The original file actually looks like the file below:

Now if I do `load('c')` on the file below I get the error:
Error using load
Unable to read file 'c'. Input must be a MAT-file or an ASCII file containing numeric
data with same number of columns in each row.
Of course I can use ImportData to import this file, but it is just soooo slow to import it.
Any suggestions?
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