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error using etime (datevec)
We can import the table using import options to specify the delimiter and datetime format. See also the following documentation...

3 years ago | 0

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Specifying required number of data points in a timetable to calculate the mean using retime
We can use a combination of dateshift and rowfun to get daily averages grouped by day with group counts. Then we can set the dat...

3 years ago | 0

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Finding Average Day for each hour from large dataset
Read data opts = detectImportOptions("https://www.mathworks.com/matlabcentral/answers/uploaded_files/894410/Weather.xlsx"); op...

3 years ago | 0

Answered
I am trying to synchronize two tables, how do I do this to keep the date and time format?
Create example data bowData = [ "10/10/2020,20:37:00.00,426988.025,5830157.551" "10/10/2020,20:37:01.00,426988.027,58...

3 years ago | 0

Answered
Converting an entire MATLAB table column from epoch to datetime format
It looks like we just need to change x = sleeponData(row,1); to the following x = sleeponData{row,1}; Note the use of curly ...

3 years ago | 1

Answered
Unstack aggegate function and preset fill value do not match
Thank you for clarifying. You can customize the fill value used in unstack by writing a custom aggregation function. "If t...

3 years ago | 0

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Answered
Combining Rows of a Table based on Matching first column entry?
Check out innerjoin and outerjoin: https://www.mathworks.com/help/matlab/ref/innerjoin.html https://www.mathworks.com/help/mat...

3 years ago | 0

Answered
Creating a table with only headers
table has a preallocation syntax: table('Size', [2 4], 'VariableNames', ["Observations", "Mean", "Treatment", "Residual"], 'Var...

3 years ago | 2

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Unstack aggegate function and preset fill value do not match
1. We highly recommend that you use datetime instead of datenum. Please let me know if you can't use datetime for some reason as...

3 years ago | 0

Answered
Table of Tables or cell of Tables
Hi Christopher, I had been trying to create a 1*13 table in which each table element was another table, however I cannot get ...

3 years ago | 0

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Answered
Table comparison [String - cell compare]
Take a look at the table functions innerjoin and outerjoin: https://www.mathworks.com/help/matlab/ref/table.join.html https://...

3 years ago | 1

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How can I perform a set of calculations on multiple matrices located in a csv. file?
Take a look at the "Large Files and Big Data" section of the doc. This sounds like a good candidate for tall arrays. https://ww...

3 years ago | 0

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Is it possible to aggregate data in a timetable with a weighted daily mean?
Another way to approach this is to 1) Copy the timetable. 2) Shift the copied timetable's row times to the start of the day. ...

3 years ago | 1

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Answered
Calculate Mean Score of subjects
You can 1) find the mean across several variables using mean(t{:, ["Var1", "Var2", "Var3"]}, 2) 2) find rows that meet a certa...

3 years ago | 0

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Answered
Combine data from multiple netCDF files
Take a look at the documentation for reading large files and big data. https://www.mathworks.com/help/matlab/large-files-and-bi...

3 years ago | 0

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Answered
How to remove extra text from date and timestamp ?
We strongly recommend using datetime instead of datenum. As Star Strider mentioned, datetime allows you to specify the 'T' and '...

3 years ago | 0

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Answered
Does MATLAB Coder support "datetime" and other date-related functions?
Starting in R2020a, you can use datetime arrays in MATLAB code intended for code generation. For more information, see Code Gene...

3 years ago | 0

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Extracting values corresponding to exact date from a table and update it in another table on a same date
1) Convert your tables to timetables This isn't strictly necessary to answer your question, but is generally a good idea when w...

3 years ago | 1

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Answered
How to call a variable from a string table and do subsequent operations, then save it as a new variable.
I would like to convert the string in variable 3 to numeric Take a look at sscanf. https://www.mathworks.com/help/matlab/ref/s...

3 years ago | 0

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Concatenate tables with variable data types in columns
As Jon mentioned, we can set the variable type explicitly for those variables we know to be floating point numeric. file1 = "ts...

3 years ago | 0

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datestr function Unrecognized month format error
We highly recommend using datetime in place of datestr, now, datenum, etc. You can get a datetime version of the same value usi...

3 years ago | 1

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Split a target date interval into seasons and find the percentile of days for each season
To add to Scott's answer, this kind of grouped calculation on timestamped data lends itself well to timetable and groupsummary. ...

3 years ago | 1

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Count frequency data from table
This can be accomplished using groupsummary and unstack. https://www.mathworks.com/help/matlab/ref/double.groupsummary.html ht...

3 years ago | 0

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Answered
Subset using time range following specific time
Two alternative workflows are Shift the midpoint and tolerance passed into withtol to achieve the desired range. Use logical s...

3 years ago | 0

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Answered
How to plot monthly data for 31 years on the same plot?
It is probably easier to store the data in a timetable and use retime to get the monthly averages. https://www.mathworks.com/he...

3 years ago | 1

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Answered
How to assign corresponding label to dataset
We can create categorical arrays using the categorical function. https://www.mathworks.com/help/matlab/ref/categorical.html ...

3 years ago | 0

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Assigning nested tables inside a parfor-loop
Adding to Walter's answer: The table constructor does not allow specifying the widths of individual variables when preallocat...

3 years ago | 1

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Answered
Calculate the Euclidean distance of simple combinations in a table
What have you tried? Where are you confused? You might want to take a look at the following documentation links: https://www...

3 years ago | 0

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Answered
What is the best way to append double arrays while working in a loop?
You can append values to a table using concatenation as follows https://www.mathworks.com/help/matlab/matlab_prog/add-and-delet...

3 years ago | 0

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Get variable value from imported text
Sounds like you could use readtable. https://www.mathworks.com/help/matlab/ref/readtable.html >> readtable('05-2350-33R.S20201...

3 years ago | 0

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