automating many column headings in table

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Kitt
Kitt 2025-1-30
评论： Kitt 2025-1-30
I have a 10000x400 matrix, plotphys, I want to turn into a table and add variable names to. I understand that can be done easily with the array2table function. However adding 400 headings is a lot; luckily I want the headings uniform in that they would be labeled
'phys state at tstep 1', 'phys state at tstep 2', ..., 'phys state at tstep 400'
Is there a way I can basically automate the creation of the headings?
I tried this
head = join("phys state at tstep " + [1:1:400]);
phystable = array2table(plotphys, 'VariableNames', {head});
but that did not work
  2 个评论
Stephen23
Stephen23 2025-1-30
编辑：Stephen23 2025-1-30
Ran in:
"but that did not work"
Why did you place the string vector inside a scalar cell array?
H = "phys state at tstep "+(1:4);
T = array2table(rand(3,4), 'VariableNames',H)
T = 3x4 table
phys state at tstep 1 phys state at tstep 2 phys state at tstep 3 phys state at tstep 4 _____________________ _____________________ _____________________ _____________________ 0.76686 0.75948 0.54232 0.41293 0.90409 0.21268 0.53549 0.085162 0.6571 0.58643 0.12335 0.27153
Kitt
Kitt 2025-1-30
I realized soon after posting that mistake.

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Star Strider
Star Strider 2025-1-30
Ran in:
Perhaps something like this —
A = randn(5,10);
T1 = array2table(A, VariableNames=compose('physical state at step %4d',1:size(A,2)))
T1 = 5x10 table
physical state at step 1 physical state at step 2 physical state at step 3 physical state at step 4 physical state at step 5 physical state at step 6 physical state at step 7 physical state at step 8 physical state at step 9 physical state at step 10 ___________________________ ___________________________ ___________________________ ___________________________ ___________________________ ___________________________ ___________________________ ___________________________ ___________________________ ___________________________ 0.31324 -0.19263 -2.0615 1.232 1.6304 0.19888 -0.32731 -0.32365 1.5333 0.053857 -2.0234 0.3876 -0.24662 0.13594 -0.9818 0.42247 0.74257 1.2531 0.61061 0.41824 -0.18386 -0.80418 -0.20084 -0.13171 0.9856 -0.21378 -0.45269 0.65468 0.92563 0.2902 -0.11079 -0.91047 -1.0124 -1.2269 -1.5752 -1.095 1.2228 0.19872 -0.14992 -0.43974 0.33118 0.11423 -0.59569 -1.6067 0.71875 0.81034 -0.16905 -0.55092 1.6094 -0.43537
.
  2 个评论
Walter Roberson
Walter Roberson 2025-1-30
编辑：Walter Roberson 2025-1-30
Ran in:
The above uses column names 'physical state at step' followed by a 4 digit number that is right-justified with proceeding spaces -- which is certainly a valid option.
However, if you would prefer to use numbers that have no leading or trailing spaces, then
A = randn(5,10);
T1 = array2table(A, VariableNames="physical state at step "+(1:size(A,2)))
T1 = 5x10 table
physical state at step 1 physical state at step 2 physical state at step 3 physical state at step 4 physical state at step 5 physical state at step 6 physical state at step 7 physical state at step 8 physical state at step 9 physical state at step 10 ________________________ ________________________ ________________________ ________________________ ________________________ ________________________ ________________________ ________________________ ________________________ _________________________ 0.41494 0.89537 0.88637 0.37133 1.5025 -0.23928 0.2796 -0.44267 1.8121 -0.69052 0.62765 -0.29731 -0.76789 0.91972 -0.33827 1.2079 0.75478 0.45772 -0.56342 0.60929 1.6159 0.27437 -1.7607 -0.1301 0.91395 -0.44986 -0.50988 1.0761 -2.3117 -1.326 -1.2961 -1.055 -0.42641 0.51182 -0.45815 -1.1123 -0.54415 1.3361 0.11306 0.82966 -0.75849 -0.42926 0.011669 -0.72911 0.54695 -0.47057 -0.12814 -0.25768 0.59814 1.5258
Kitt
Kitt 2025-1-30
that worked perfectly!!!! Thank you so much :)

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