Answered
Trying to get time between each start and stop & total time per day from a text file.
I would go with unstack: >> T1 = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/702232/FDATA.TXT'); ...

4 years ago | 0

Answered
How to vertically join differently sized tables?
One way is to "assign off the end": >> table1 = table(1,70,175,29,datetime(1992,7,1),"M",'VariableNames',{'Num','Weight','Heigh...

4 years ago | 1

| accepted

Answered
Connect correct temperature to another table based on time
Use timetables. It's a one-liner: >> A = timetable(datetime(["13-aug-2020";"14-aug-2020";"15-aug-2020"]), [13.8; 12.2; 8.5]) ...

4 years ago | 1

| accepted

Answered
bar graph with non numerical x-axis
Simon's solution is one way to do it. But using categorical just to label the bars is kind of an abuse of categorical, which is ...

4 years ago | 1

Answered
How to treat a duration array in a for loop?
Judith, I can't really follow what you are doing, but if you have timestamped data, you should be using a timetable, and then re...

4 years ago | 1

| accepted

Answered
Reorganize table and make groups of rows to columns
You need unstack: >> Date = datetime(1963,[1;2;3;1;2;3;1;2;3],[31;28;29;31;28;29;31;28;29]); >> Permno = [10065;10065;10065;10...

4 years ago | 2

| accepted

Answered
Delete rows in cell aray where there is anything in one collum.
A cell array is the wrong way to store these data. You want a table, or probably a timetable. The fact that you say, "the name o...

4 years ago | 0

| accepted

Answered
Prevent overwriting within a for loop in 3D-motion tracking
You may just want T = table(); for ... ... T = [T; readtable (thisFile)];

4 years ago | 0

| accepted

Answered
How to convert the number of seconds from an epoch into UTC using the datetime function.
Matthew, this is easier than you think. In MATLAB, 'TimeZone','UTC' is sort of a ficticious timeline that pretends that leaps se...

4 years ago | 2

| accepted

Answered
How to plot only the matches of two different datetime?
If all you have are two datetime vectors, you can use intersect to find the common values. But I'm guessing you have other data ...

4 years ago | 0

Answered
How to filter the data.
Not sure how you are getting those data into MATLAB, but I suggest that you figure out why you have a cell array. You want a tab...

4 years ago | 0

Answered
extracting columns from multiple cell arrays consist of table data
If you've read two "similar" tables into a 2x1 cell array, best ting to do is to vertvat them outside the loop: >> C = {array2t...

4 years ago | 1

| accepted

Answered
split cell in 2 columns
Use cellfun, two possibilities: function [val1,val2] = myfun1(x) val1 = x(1); if isscalar(x) val2 = 0; else val2 =...

4 years ago | 0

Answered
How do I find the corresponding date/time value of the maximum of my data in a table?
This is a pretty common question, so I'm gonna show a bunch of stuff in hopes others can find it useful. Let's start with a sim...

4 years ago | 0

| accepted

Answered
how to sort a cell array inside a struct?
I think you would be better off with a table than a struct. Name_Code = table(IDs, C,'VariableNames',["Name" "Codes"]) Name_Co...

4 years ago | 0

| accepted

Answered
Error with splitting table into separate columns.
This is an application of unstack and then stack. The code looks a lot more complicated than it might if I hard-coded in sizes, ...

4 years ago | 0

| accepted

Answered
Coordinate interpolation with time
This line of code pf = polyfit(Lat(:,1) Lat(:,2)], [(Long(:,1) Long(:,2)] %Coordinates is not valid syntax for several reasons...

4 years ago | 0

Answered
Smartly search between tables
This would be trivial if varfun accepted more than one table input, but it doesn't do that. But you can make one table that look...

4 years ago | 0

Answered
Calculete monthly anomalies time series temperature
You are not doing yourself any favors by using raw numeric vectors with no timestamps. This is almost trivial using datetime and...

4 years ago | 1

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 ...

4 years ago | 0

Answered
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 ...

4 years ago | 1

Answered
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...

4 years ago | 1

Answered
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...

4 years ago | 1

| accepted

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...

4 years ago | 0

Answered
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 ...

4 years 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...

4 years ago | 0

Answered
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...

4 years ago | 0

Answered
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...

4 years ago | 0

Answered
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...

4 years ago | 0

Answered
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...

4 years ago | 0

| accepted