Community Profile

photo

Jeremy Hughes


Last seen: Today

MathWorks

110 total contributions since 2015

Software Developer, Musician and Science Fiction Writer.

Jeremy Hughes's Badges

  • Personal Best Downloads Level 1
  • Editor's Pick
  • First Review
  • 5-Star Galaxy Level 4
  • First Submission
  • Knowledgeable Level 3
  • 6 Month Streak
  • Revival Level 1
  • First Answer

View details...

Contributions in
View by

Answered
Csv file: reading values with comma
I think you need to set the decimal separator and thousands separator. Also, duration may be the better type for two of the vari...

ongeveer een maand ago | 0

Answered
Problem to read csv file with a blank line
Hi, As others have pointed out, your CSV (Comma separated value) file is actually semicolon separated. If readtable is using c...

ongeveer 2 maanden ago | 0

Answered
How to import data from attatched csv file?
In R2020a, T = readtable('data.csv','TrimNonNumeric',true,'NumHeaderLines',11); or in earlier releases, opts = detectImportO...

3 maanden ago | 1

Answered
How to import data from .txt file?
The textscan function expects a fileID, not a file name. you need to use fopen. [filename,pathname]=uigetfile({'*.fl.txt' 'Torq...

3 maanden ago | 0

Answered
readtable with multiple date formats
Without seeing the file, I can only guess, but I'd try the following first: T = readtable(filename,'DateLocale',locale,...) No...

3 maanden ago | 0

| accepted

Answered
How to use Excel application, how can i know all the functions and ways to use it?
Active X is a Microsoft feature, controling the application depends on the APIs the application exposes. For Excel, you should c...

3 maanden ago | 1

Answered
using spreadsheet column headers as variable
When you create import options from scratch, you need to specify all the information, including where the variablenames and data...

5 maanden ago | 0

Answered
Error using readmatrix - Unable to determine range. Range must be a named range in the sheet or a single cell within 'XFD1048576'.
'Range' also accepts numeric inputs [r1 c1 r2 c2], the drawback being you need to specify the columns. You can specify only the...

6 maanden ago | 1

| accepted

Answered
Using writetable to create a text file
WriteMode is available in R2020a. What version are you using?

6 maanden ago | 0

Answered
How to change the date format of ,txt file?
https://www.mathworks.com/matlabcentral/answers/516121-how-do-i-specify-a-datetime-format-when-reading-a-csv-excel-file

7 maanden ago | 0

| accepted

Answered
Errors using xlsread to import data from Excel
Sometimes the Excel instalation can break xlsread, there shouldn't be a reason MATLAB install changed anything for you. It might...

7 maanden ago | 1

| accepted

Answered
how to check whether a sheet exists or not, while using readtable function
I don't know if it's any better, but there is https://www.mathworks.com/help/matlab/ref/sheetnames.html Otherwise, try/catch mi...

8 maanden ago | 1

Answered
Error in XML file
You could try fid = fopen(fname); bytes = fread(fid); fclose(fid); find(bytes==1) If that doesn't find anything, then it ma...

9 maanden ago | 0

Answered
Does MATLAB add extra data to text files?
I'd check the new line characters "\r" isn't typically used for a new line in most modern environments. It may be that the tex...

9 maanden ago | 1

| accepted

Answered
textscan does not read all rows
If you pass in 'ReturnOnError',false with the textscan call, there will be an error message where the format cannot read your fi...

9 maanden ago | 0

Answered
readtable skipping some rows
detectImportOptions detecting Space as the delimiter, (correctly I think) and is looking at the "N/A" and "NE 45" and treating t...

10 maanden ago | 0

Answered
Read text file with multiple rows of fields
The current best way I know how to do this is with TEXTSCAN. fmt = "%s%s%s%s%*[^\r\n]%*[\r\n]%s%s%s%s" fid = fopen('sampleFile...

11 maanden ago | 1

| accepted

Answered
Problems with readtable within parfor on R2018b for Win 64
Try using READTABLE with the 'UseExcel',false parameter. (This might also be 'Basic',true in older releases.)

12 maanden ago | 0

Answered
First colum of CSV-imported table has "x___" added to its name
The file probably has a Byte Order Mark in the beginning. If you read the raw bytes using fopen/fread you can see the mark at ...

ongeveer een jaar ago | 2

Answered
How can I increase the speed of this loop?
It's hard to say without looking at the contents of the file's you're reading. You're overriding n in the for loop with n as th...

ongeveer een jaar ago | 0

| accepted

Answered
textscan with formatted input data
This should be able to read this without much issue. opts = detectImportOptions(filename) T = readtable(filename,opts)

ongeveer een jaar ago | 0

Answered
How to read specific numbers (colums) of a csv file
I'd do this: opts = detectImportOptions(filename); opts.SelectedVariableNames = opts.VariableNames([3 4]); T = readtable(file...

ongeveer een jaar ago | 0

Answered
Read a very large .csv file, split into parts and save each part into a smaller .csv file
If your plan is to write all the small CSV files out, and do nothing with them in MATLAB, I'd say just use tabularTextDatastore,...

ongeveer een jaar ago | 0

| accepted

Answered
Read a specified list of images given the filename and the directory the files are in
Datastores are convenient for reading collections of files. imds = imageDatastore(directory) imshow(read(imds)) Each time you...

ongeveer een jaar ago | 0

Answered
Readtable for a huge (no good schema) CSV file!
opts = detectImportOptions(FileName,'Delimiter',';','NumHeaderLines',18) T = readtable(FileName,opts)

ongeveer een jaar ago | 0

Answered
readtable not understood behaviour
A simpler way to do this would be: lines = splitlines(fileread(filename))

ongeveer een jaar ago | 0

Answered
Readtable from i-th row to last row
Try this opts = detectImportOptions(filename,'NumHeaderLines',6) T = readtable(filename,opts)

ongeveer een jaar ago | 2

| accepted

Answered
Readtable() confused by quotation marks? Matlab 2019a
opts = detectImportOptions('myfile.txt','FileType','text','Delimiter','|') T = readtable('myfile.txt',opts)

ongeveer een jaar ago | 0

| accepted

Answered
How to read in a non-standard formated CSV file containing times and measurments and change the output format?
You could do this with textscan fid = fopen(file); vars = textscan(fid,'TIM%f%fABC%fDEF%fGHI%f','Delimiter',{','},'Whitespace'...

ongeveer een jaar ago | 0

Answered
readData() function error message when using mapreduce
ds.TextscanFormats{15} = '%q' That will at least get you past the one line that's causing the problem here. For a more robust a...

ongeveer een jaar ago | 0

| accepted

Load more