Answered
repeating step signal in real time with a hold value of 5 seconds
Like this? >> interp1([1 5 6 10 11 15],[1 1 2 2 3 3],1:15,"prev") ans = 1 1 1 1 1 2 2 2 2 ...

3 mois ago | 0

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how to expand the date matrix?
roudan, this question doesn't seem to make any sense. For one thing, it doesn't seem useful that you have a column whose header ...

3 mois ago | 1

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Program architecture for handling large .csv files
With no code at all to go on, it's pretty hard to give specific advice. Hex issues aside, the first advice I would give would b...

3 mois ago | 1

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Transforming data table from wide to long format
stack to the rescue, twice, because you are stacking two pairs of variables all into one variable: >> tw = readtable("wide_form...

3 mois ago | 1

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Answered
Trying to use retime to sum daily values, but I don't want days that only have NaN values to become 0
In the doc for retime (admittedly, not really in flashing bold letters): "All the listed methods omit NaNs, NaTs, and other miss...

3 mois ago | 0

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Split a target date interval into seasons and find the percentile of days for each season
Another possibility: >> yr = 2020; >> edges = datetime(yr,[1 3 6 9 12,12],[1 1 1 1 1 32]) edges = 1×6 datetime array ...

3 mois ago | 1

Answered
hours(diff(datetime([t1;t2]))) function
In addition to what others have said, you probably don't need the "hours" in hours(diff(datetime(t1;t2]))) All that does is tu...

3 mois ago | 0

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Unable to perform assignment because the left and right sides have a different number of elements.
No idea what filename = 'Format_competition.xlsx'; has to do with this, so I suspect you have not told us the whole story. In...

3 mois ago | 0

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Plot time series analysis from multiple netcdf files
Mir, I'm not very familiar with MATLAB's netCDF features, but there are ways to read the files and you should read the doc about...

3 mois ago | 0

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Convert Number to Time / Duration Format of Data Column
This is much simpler than you think. You can't currently parse things like "000002" directly into duration, but you can get ther...

3 mois ago | 0

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Perform a calculation using data from multiple tables
Mark, have you tried using join? t = readtable("flight data.xlsx","TextType","string") t = join(t,T_Distance,"LeftKey","Destin...

3 mois ago | 0

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Answered
How to simply the code
"I'm working with cell arrays": Riccardo, you don't want to be doing that, especially not with 100000 rows. Or using a loop for ...

3 mois ago | 0

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How to stackplot a table?
That seems overly complicated. stack to the rescue? >> t = table(datetime(2021,7,26,0:2:22,0,0)',datetime(2021,7,26,1:2:23,0,...

3 mois ago | 0

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How to manage NaN values and calculate mean under conditions
Another possibility that uses and preserves a timetable: >> tt = readtimetable("Daily data.xlsx"); >> head(tt) ans = 8×1 t...

3 mois ago | 0

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Insert two plots and a precreated table in the same figure
Camilo, in general you don't need all those table2array calls. Just do this: plot(Tablecalc.NameOfYour6thVar,Tablecalc.NameOfYo...

3 mois ago | 1

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Subscripting into a table using three or more subscripts (as in t(i,j,k)) is not supported. Always specify a row subscript and a variable subscript, as in t(rows,vars).
Lihi, hard to say for sure, but you may want to make a table that contains those four tables. For example: >> baseline = table(...

3 mois ago | 0

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find elapse time with date rollover
Get away from using datenum. Can't say this strongly enough. >> tstr=["11:58:00"; "11:59:00"; "00:00:02"; "00:02:04"]; >> tod ...

3 mois ago | 1

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How can I create a mat file which changes the values of a column in excel table into the mat file's column headers?
I thnk you'd want to use readtimetable or readtable to bring the first xlsx into matlab. But I'm confused: the second xlsx only ...

3 mois ago | 0

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Problem using ranova for analysis of variance
Scott, haven't you explicitly not included DietaryGroup with that minus sign? I think you are using it for predictors in a way t...

3 mois ago | 0

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Answered
EDF reading: edfread gives timetable; possible to get struct?
Andrew, FEX issues aside, it's possible that the DataRecordOutputType parameter to edfread may help. But it's also possible that...

3 mois ago | 1

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how to use setvartype on a table that is already existing
setvartype is an import feature. let's come back to that. cell creates a cell array containing nothing but 0x0 doubles: >> c =...

3 mois ago | 0

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cant put char array in a table of char!
Don't use raw char arrays other than a char row vector. You will eventually be unhappy. Unless you are using a very old version ...

3 mois ago | 0

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How to filter first fixation times for participants
Like SS, I tried to make sense of this code. And I found the same thing: in a recent version of MATLAB, these few lines would ha...

3 mois ago | 0

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Conversion and Merger of date and time using datetime
You are correct to use datatime to parse those times of day with : as the decimal separator; duration can't currently do that. A...

3 mois ago | 1

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Normality test of the Matlab function 'randn'
With all due respect (and I mean that), nonsense. MadhiH, I don't know what you mean when you say that, "the p-value is too hig...

4 mois ago | 3

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Convert julian date SAC to specific format date
I'm gonna suggest another solution that might be simpler to follow. First thing is that this isn't a Julian Date in the strict...

7 mois ago | 0

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How to easily propagate the error of a column ?
Aaron, I think that depends on what you mean by "propagate the uncertainties". There is a simple formula for the variance of the...

7 mois ago | 0

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Time series data events
Ben, I'm not sure where you are starting from. I'm gonna show how to do this with timetables. Imagine you have a timetable conta...

7 mois ago | 1

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Answered
get GPS time to calulate time since referencje epoch
Marta, that depends on what you mean by "GPS time". MATLAB doesn't yet have direct support for GPS time, but if all you want is...

11 mois ago | 0

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Answered
Find the certain amount of values between NaNs and make another variable from these values
There's no need to loop over the 750K elements. Do this on each row x of your data, i.e. loop from 1:50. Try stepping through t...

11 mois ago | 0