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Eric Sofen

Last seen: Today Active since 2018

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  • 3 Month Streak
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Answered
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...

3 days ago | 0

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...

4 days 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 days 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...

3 months ago | 0

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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:...

3 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...

3 months ago | 2

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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...

3 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...

3 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...

6 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....

6 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,...

6 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...

10 months ago | 0

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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...

10 months ago | 1

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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...

10 months 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';...

10 months 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

10 months 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

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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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Answered
How can I compute the mean value over a time interval?
If you have, for example, data once per second for an hour and you want to calculate mean values for each minute, I'd recommend ...

1 year ago | 0

Answered
Plot data from a table that has years in the rows and months in the columns
Here's another way to tackle this, sticking with using table to contain your data. t = readtable('NOAA_CPC_OceanicNinoIndex.xls...

1 year ago | 0

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Loop through date time heart rate data
Can you assume that the data is always sampled uniformly every 2 minutes? That can simplify things, but the code below should be...

1 year ago | 0

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create a 2 dimensional table from a table containing multidimensional entries
Check out the splitvars function.

1 year ago | 0

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Retime data aggregation for ID
Another approach is to unstack the timetable based on the sensor ID, so you'd have a wide timetable with separate variables temp...

1 year ago | 0

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Timetable - loop through days to check for a condition occurring during midday the day prior to midday of the current day
As a starting point, take a look at the retime function. I think the easiest way to do this is create a copy of the timetable,...

1 year ago | 0

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Answered
How to plot the graph according to the time
Read the data in as a timetable, You can pull out all the data where the hour is 8 by doing: tt8 = tt(tt.Time.hour == 8, :) Th...

1 year ago | 1

Answered
Compiled Function trying to access non-existent @tabular\hasvars.m method (matlab 2020a)
I looked into that warning, and you can safely ignore it. It is also not present in R2020b.

1 year ago | 0

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Answered
Cumulative sum within group, reset when encounters a 0
It took me a while to come up with a way to do this without looping, then it clicked! You need to create groups based on where t...

1 year ago | 0

Answered
How to combine two tables with measurements taken over the same range but different intervals?
This is a tricky problem. I agree that conceptually it seems like a join, but you don't have exact matches in start/end between ...

1 year ago | 0

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