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Jeremy Hughes

Last seen: Today Con actividad desde 2015

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Respondida
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...

alrededor de 4 horas hace | 0

Respondida
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...

3 meses hace | 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...

5 meses hace | 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"...

6 meses hace | 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 = @...

7 meses hace | 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...

7 meses hace | 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...

8 meses hace | 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"...

8 meses hace | 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 "". ...

10 meses hace | 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, ...

10 meses hace | 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...

10 meses hace | 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...

11 meses hace | 0

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Respondida
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...

alrededor de 1 año hace | 0

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Respondida
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? ...

alrededor de 1 año hace | 0

Respondida
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...

alrededor de 1 año hace | 1

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Respondida
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...

alrededor de 1 año hace | 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...

alrededor de 1 año hace | 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...

alrededor de 1 año hace | 0

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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","...

alrededor de 1 año hace | 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...

más de 1 año hace | 0

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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...

más de 1 año hace | 0

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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...

más de 1 año hace | 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...

más de 1 año hace | 0

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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...

más de 1 año hace | 0

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

más de 1 año hace | 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" ...

más de 1 año hace | 1

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why "writetable" replaces points with commas ???
@Walter Roberson, @Peter PerkinsYou're both right. Walter is more right. An XLSX file is a zip file containing XML data which ...

más de 1 año hace | 0

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Importing 4D Excel data sets
You might try readcell. It will at least give you all the data. You will have to restructure it to get the format you'd like.

más de 1 año hace | 0

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Program architecture for handling large .csv files
First, it would help to see an example file, and some sample code that demonstrates the problem. Here's the best I can say wit...

más de 1 año hace | 0

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how to use setvartype on a table that is already existing
This will do what you're literally asking for. T = array2table(strings(200,0)) % 200 variables, 0 rows, all string type But I ...

más de 1 año hace | 0

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