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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 ...

4 years 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,...

4 years 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...

4 years 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...

4 years 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(...

4 years 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 ...

4 years 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 ...

4 years 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...

4 years ago | 0

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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...

4 years 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 =...

4 years 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 ...

4 years 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...

4 years 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...

4 years 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 years 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...

5 years 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...

5 years 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...

5 years ago | 1

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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...

5 years ago | 1

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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...

5 years ago | 0

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Finding row number of a variable existing in a table
I have no idea what you mean by "In this case the second column and third row of the table.", but this sounds like what you want...

5 years ago | 0

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Correlating values from a table using a for loop
Not sure why you think a "loop is better". Try this: >> t = table([1;1;1;1;2;2;2;2;2;2],rand(10,1),rand(10,1),'VariableNames',[...

5 years ago | 0

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Comparing matrices and filling in the gaps
There are just so many things you can do with joins: >> a = table(["A";"B";"C";"D";"E";"F"]); >> b = table(["B";"D";"F"], [5;1...

5 years ago | 0

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Time weighted average after every 60mins
Or put the data in a timetable and use retime(tt,'hourly','mean'). If you need weights, you can write your own aggregation funct...

5 years ago | 0

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How can I construct a struct handle from a string?
A scalar struct with a field for each variable that you would have put in the workspace is often useful. It's like a private wor...

5 years ago | 1

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Keeping columns names but replacing value for iteration
You are horzcat'ing tables, and table variable names must be unique. But your two tables both have variables named dist1, dist2,...

5 years ago | 1

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Preallocation of a vector of structure
Audric, it seems like dpb understand what you are doing better than I do, but "in which each cell will be a structure of 42 fiel...

5 years ago | 0

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convert hourly data to daily sum
Turn your table into a timetable, and use retime: >> hourmelt = table2timetable(hourmelt); >> head(hourmelt) ans = 8×1 tim...

5 years ago | 0

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missing/incorrect use of math operators?
Jocelyn, modulo Geoff's concerns, I think your whole loop can be done as x = 200*3*(0:5)'; Vx = (sqrt(Vx_o) - ((k3/2).*x))^2; ...

5 years ago | 0

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Matching the size of two matrices based on values of a column
"contains time in a day in decimal form": That would be your problem. Use timetables with datetimes (or maybe durations?), and u...

5 years ago | 1

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How can I fit a mesh plot axis to a vector of time values?
Does this not do what you need? >> d = datetime(2020,11,1:20); >> t = 1:15; >> mesh(d,t,x) Those dates and temps are evenly-...

5 years ago | 0