Jeremy Hughes

Last seen: 10 jours il y a | Actif depuis 2015

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MATLAB For-Each
Tools for simplifying for-loops. Customizable loop iteration.

22 jours il y a | 4 téléchargements |

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Problems reading datetimes with readtable
There is a slight issue with the file format in question. The second case looks to readtable like three columns if you choose sp...

environ un mois il y a | 0

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Nonstandard input date format into readstruct function?
I believe this is a bug. I've created a bug report internally. Thanks.

environ 2 mois il y a | 0

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Importing Excel Database Into MATLAB
This issue is in the call to readtabkle test = readtable('./dataset2.xlsx','Sheet','Sheet1','Range','A2:CA26','TreatAsEmpty',{'...

environ 2 mois il y a | 0

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formatstring error when using tabularTextDatastore
Turns out this was a bug in R2020a and is been fixed in R2020b. See: https://www.mathworks.com/support/bugreports/2263913 You c...

environ 2 mois il y a | 0

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MATLAB system command bug - returns partial stdout
Very late to the story here, but there was a bug in the linux kernal that affected the system command in this way. https://www.m...

4 mois il y a | 0

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Readtable is not reading my delimiter and datetime columns correctly
Passing in the delimiter is the right thing to do. The detectImportOptions function (which is being called by readtable) tries t...

7 mois il y a | 0

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Is it possible to decide which line is variable names in readtable?
You can try: readtable(filename,"NumHeaderLines",2) or opts = detectImportOptions(filename) opts.VariableNamesRange = "A3"...

7 mois il y a | 0

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filedatastore; read M mat files of size (1xL) into single tall array that is of size (1, L*M)
In general, you'll have better luck identifying where the problem lies by looking at each piece of the code separately. fcn = @...

9 mois il y a | 1

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Help with code, writematrix not working. Please help fix
The error reffers to mpower.m being a script and not a function. mpower is a builtin function, and mpower.m contains only help t...

9 mois il y a | 0

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Export arrays to excel
If each variable is 1x5000 then your original code is creating a 1x35000 block of data when you put it in the table. This is val...

10 mois il y a | 0

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fwrite and MATLAB for a raid0 disk - Only one lane?
I was playing around with this and found that this is much faster (by a factor of 3 on my machine): fwrite(fid,data(:),"double"...

10 mois il y a | 0

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Reading .txt file in MATLAB with issue in formatting
The issue is that \" is not how CSV files (and thus readtable) escape doube-quotes. To escape quotes, the file should have "". ...

11 mois il y a | 0

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Export data to specified excel rows using writematrix
I believe it should be possible to do this using (almost) the syntax you tried, and there are some suggestions in the comments, ...

12 mois il y a | 0

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How can I identify the maximum value in a column and then grab specific cells in the same row as that value?
Sounds like, in MATLAB table nomenclature, you want to find the row of the table that contains the maximum value of a particular...

12 mois il y a | 0

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"Unable to find or open 'Filename.txt'" error in MATLAB 2022a for files from a shared network drive.
Try first >> cd Z:\Groups\Smith_G\Ryan Poland\MultiPAS-IV\Data\NO2 Calibration\20210930 If that works, then you can either ad...

environ un an il y a | 0

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File Extensions Name-Value pair error
The issue is that .csv isn't a supported spreadsheet format. Many people associate csv with spreadsheet, and that's likely due t...

environ un an il y a | 0

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Create a datastore from a table
I had no issue with arrayDatastore taking a table. Could you share some sample code with the errors or problems you're seeing? ...

environ un an il y a | 0

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How to use textscan with empty char fields
The format specifier %c always reads one character, no matter what that character is. What you likely want it %s, which reads al...

environ un an il y a | 1

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Convert serial number date in date string - Excel file
First, I would suggest using readcell if you want to get datetimes. This will give you the right thing by default. Otherwise, c...

environ un an il y a | 0

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readmatrix not working in 2021b
I agree with the previous answer, but readmatrix is probably not what's being shadowed. It's probably something readmatrix relie...

environ un an il y a | 0

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how to read mixed date and data
I made some corrections in the comments above, but this is how I would do this more robustly using partial detection with detect...

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use of readtable to read unstructured data
Based on the file attached, I suggest treating this as a fixed width file. opts = detectImportOptions("sample.txt","FileType","...

plus d'un an il y a | 0

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How to delete multiple rows from a table using a for loop (with a condition)?
I wouldn't use a for loop. MATLAB excells at array operations. A = randn(12,5); % Make some data with positive and negative v...

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Why are there a few bytes added every time I call writetable?
writetable write "into" a sheet by default. And there's some meta-data being added, but I'm not sure if it's MATLAB, or the exce...

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Unable to detect datetime or duration data in file for row times
Hi Sangani, This is a consequence of how Excel stores "time" data. It represents it as a "number" internally, with a custom for...

plus d'un an il y a | 1

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{0*0 char} error while Importing .dat file
Instead of readtable and table2array, you could instead use readmatrix (as of R2019a) directly. The reason some of the columns...

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readmatrix command not working
This looks like an installation issue to me. Something is missing/broken causing initialization error in the internal code. Doe...

plus d'un an il y a | 0

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Reading .txt with multiple delimiters
Readtable accepts multiple delimiters. Try this: T = readtable(filename,"Delimiter",[" ","|"])

plus d'un an il y a | 0

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readtable not reading logical values as expected
The default results of detectImportOptions seeing "1" & "0" will be numeric, and the default logical reading expects "true","t" ...

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Jeremy Hughes

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