Convert a Cell array to a timetable

Hi, I have

A1=1x78995 cell array;

cell array {1x1800 double} {1x1800 double}.....

And A2 1x78995 cell with datetimes.

How can a create a timetable like

Time=timetable( [A2{1:78995}]',[78995x the first value of1800]'......,[78995x the last value of 1800])

so that I have a timetabel of 78995x1801 at the end.

Thank you.

[Jacob Mathew]

Hey CSCh,

Could you share the data or a snippet of it ?

Answer 1

[Steven Lord]

If you have a set of row vectors in a cell array

sampleCell = {1:10, 11:20, 21:30};

first to accomplish your stated goal you need to transpose them into column vectors.

sampleCellTransposed = cellfun(@transpose, sampleCell, UniformOutput=false);

Then pass them into the table or timetable function as a comma-separated list.

T = table(sampleCellTransposed{:})

T = 10x3 table
    Var1    Var2    Var3
    ____    ____    ____

      1      11      21 
      2      12      22 
      3      13      23 
      4      14      24 
      5      15      25 
      6      16      26 
      7      17      27 
      8      18      28 
      9      19      29 
     10      20      30 

To make a timetable, of course one of the inputs must contain time-based data. In this case since none of the cells in sampleCellTransposed do, I pass it in as the first input argument.

dt = datetime('today')+(0:9).';
TT = timetable(dt, sampleCellTransposed{:})

TT = 10x3 timetable
        dt         Var1    Var2    Var3
    ___________    ____    ____    ____

    26-Nov-2024      1      11      21 
    27-Nov-2024      2      12      22 
    28-Nov-2024      3      13      23 
    29-Nov-2024      4      14      24 
    30-Nov-2024      5      15      25 
    01-Dec-2024      6      16      26 
    02-Dec-2024      7      17      27 
    03-Dec-2024      8      18      28 
    04-Dec-2024      9      19      29 
    05-Dec-2024     10      20      30