How to use cumsum for single column matrix non integer values

Hi,

I have this single column array

km =

   48.8236
   26.0224
  207.8332
  182.5684
  186.1395
  184.3869
  183.3776
  189.1579
  188.4118
  186.5033
   93.2608
  338.8983
  304.3481
  181.5408
  173.1552
  114.0832
  149.5733
  148.9748
  147.1931
  132.4991
   97.0483
   35.4943
   22.2470
  174.0249
   47.2259
   47.0986
  251.9559
  126.3655
  254.0408
  134.7754
  
  display (km)

I have tried this code but get this error:

cs = cumsum(km,1)
display(cs)

"Index in position 1 is invalid. Array indices must be positive integers or logical values" - error is in cs = cumsum(km,1).

How would like to add each previous value to the next one and so on, like so:

km =

   48.8236
   26.0224
  207.8332
  182.5684

goes to:

km =

   48.8236
   78.8460
  282.6972
  465.2476

Answer 1

[Ameer Hamza]

It seems that you have somewhere defined a variable name 'cumsum', which confuses MATLAB by shadowing the built-in function named cumsum(). Remove this variable

clear cumsum
cs = cumsum(km); % cs = cumsum(km,1); 1 is optional here

[Charlie Hillary]

Worked great!