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Eric Sofen

Last seen: 1 day ago Active since 2018

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Answered
Problems trying to find fakes dates.
The reason datetime(2005,2,29) works is that we want to support constructing a vector of datetimes: datetime(2023,1,1:100) Not...

9 days ago | 0

Answered
Case insensitivity for keys in outerjoin and ismember?
We've had a variety of requests for a "lenient" join, but there's also a variety of different interpretations of "lenient." :-) ...

1 month ago | 1

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Answered
How I can create a while cycle that ends after a sepecific time
I think timer is likely to give you better precision for this sort of thing than tic/toc (tic/toc is better for timing performan...

1 month ago | 0

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convert cell array into date and time string
As much as I love string, there's no need to do an extra type conversion. Just concatenate the elements of the cell into a char ...

1 month ago | 0

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Break array or timetable into smaller versions and find max value
Normally, groupsummary or varfun should be the starting point for grouped calculations like this, but your particuar problem is ...

1 month ago | 1

Answered
result in table format or excel format
It's a little circuitous, but you can use writelines to write the char vector to a text file, then use the power of readtable to...

1 month ago | 1

Answered
Merge tables with different columns and for matching columns update missing values in left table with values from right table
This is a tricky combination, and not doable in a single join right now. As you say, the outerjoin of A and C to create a table ...

1 month ago | 0

Answered
How to extract all the data between two different dates?
I'd recommend using a timerange. Isbetween returns a logical vector based on a vector of datetimes. This can then be used to in...

1 month ago | 1

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How can I isolate and subplot June from the whole year?
Using datenum is no longer recommended. I'd encourage you to use datetime for date and time calculations in MATLAB. Among other ...

1 month ago | 0

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Creating Simulink dataset with timetable for importing in simulink signal editor
We're aware of this issue and have been working to reconcile it. The time vectors in Simulink and timetable are constructed in b...

3 months ago | 0

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Read netCDFs in loop and export to table with different sizes
I would suggest using timetable and the synchronize method. I assume nlevel is the sensor data? If so, build up a cell array of...

4 months ago | 0

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Answered
divide year time data into days and nights
Steve beat me to it, but here's another solution that uses the datetime isbetween function. SunriseSunset = table((1:365)',date...

5 months ago | 0

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Answered
Add code to have switch repeat if a case is not met
A while loop is one way to accomplish this. Also note that you can use lower() to reduce the number of cases. max_number = na...

5 months ago | 0

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Adding time to time string
Here's another slightly different approach. There's no need to replace "/" with "-" for datetime to parse it. Duration can parse...

7 months ago | 0

Answered
Convert DoY and hour to datetime format
The datetime constructor is forgiving about day values that don't fit within a particular month and wrapping them appropriately:...

7 months ago | 0

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Compare table variables with input list and replace missing vars with NA
Readtable and outerjoin do the trick (xlsread is discouraged at this point - readtable is preferred). FYI, there's also a join L...

7 months ago | 2

Answered
Sorting/Grouping based on date for all years
The isbetween function can also help simplify a lot of the logical indexing to pull out the ranges of interest. tt = readtime...

8 months ago | 1

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How to make the following code valid for tables not only matrices
There are a few ways to rework the indexing to work with tables. By the way, I'm not sure what the loop does (ied doesn't appear...

8 months ago | 0

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How do I find a single value by corresponding data in 2 different tables?
It sounds like you are trying to align these two things based on time? If so, check out the synchronize method of timetable. The...

11 months ago | 0

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Replace string values in a table
This is what categorical is built for! When you create the categorical, you can specify the data, value set, and category names....

11 months ago | 0

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How to extract table data based on column values?
One thing to watch out for is that the char vectors contained in the cell arrays (celltrs) can vary in the number of characters,...

11 months ago | 0

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Answered
I want to separate each gait cycle and keep each cycle in a row of a table.
If you separate each cycle into a separat row, the rows will likely have data of different lengths, which then gets hard to work...

1 year ago | 0

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Answered
Problem with datetime in German
We’re aware of the issues with parsing month abbreviations in some locales, and we're looking at ways to improve this. In this c...

1 year ago | 1

Answered
Creating a for loop that goes through 12 month data in sets of 2
T = readtable('Levenmouth7MWTurbineData2019.csv') ; T.month = month(t.disc_TimeStamp); tiledlayout(3,2) for m = 1:2:12 m...

1 year ago | 0

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Answered
Multi Row Tables / Combine information where row is equal?
You can use varfun to apply the cumsum function to each group defined by Parset1. Parset1=['A';'A';'B';'B']; Parset2=['x';'y';...

1 year ago | 1

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Answered
Why am I getting the following datetime error message?
I think it's just a typo in your timestamp format spec: ss.sssZ should be ss.SSSZ

1 year ago | 0

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Answered
How to make a new table from two different table with common value?
You should be able to use innerjoin on T1 and T2 - no need for C. The innerjoin function calculates the equivalent of C as an in...

1 year ago | 0

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Summarize two tables of different data and dates into exact matches of one of the two datasets
Another way to solve this is to synchronize the lower-resolution chemistry timetable to the higher-resolution discharge data. My...

1 year ago | 0

Answered
How to handle NAN when summing
You can pass a flag to sum to 'omitnan'.

1 year ago | 0

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Answered
How to match trial number to time stamps given two sets of data?
Assuming your timestamps are durations (you probably want A to be a timetable with duration row times), you can use the isbetwee...

1 year ago | 0

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