multiple a vector by a scalar using dot error

So yet another problem for my day

I am trying to multiply a simple cell array fill of ints by a scalar value

if i print out

my_array{1:end , 1}

I get a bunch of ints back

However if i say

my_array{1:end , 1} * 5

I get a "too many input arguments" error from matlab

One would assume you need element wise multiplication here

So i resort to

my_array{1:end , 1} .* 5

And guess what, same error

too many input arguments

How is that even possible?

Suggestions?

Answer 1

[DGM]

I guess I already mentioned this, but

A = num2cell(reshape(1:70,10,[]))

A = 10×7 cell array
    {[ 1]}    {[11]}    {[21]}    {[31]}    {[41]}    {[51]}    {[61]}
    {[ 2]}    {[12]}    {[22]}    {[32]}    {[42]}    {[52]}    {[62]}
    {[ 3]}    {[13]}    {[23]}    {[33]}    {[43]}    {[53]}    {[63]}
    {[ 4]}    {[14]}    {[24]}    {[34]}    {[44]}    {[54]}    {[64]}
    {[ 5]}    {[15]}    {[25]}    {[35]}    {[45]}    {[55]}    {[65]}
    {[ 6]}    {[16]}    {[26]}    {[36]}    {[46]}    {[56]}    {[66]}
    {[ 7]}    {[17]}    {[27]}    {[37]}    {[47]}    {[57]}    {[67]}
    {[ 8]}    {[18]}    {[28]}    {[38]}    {[48]}    {[58]}    {[68]}
    {[ 9]}    {[19]}    {[29]}    {[39]}    {[49]}    {[59]}    {[69]}
    {[10]}    {[20]}    {[30]}    {[40]}    {[50]}    {[60]}    {[70]}

A{2:2:end,7} % this expression has multiple outputs (multiple scalars)

ans = 62

ans = 64

ans = 66

ans = 68

ans = 70

vertcat(A{2:2:end,7}) % this expression has only one output (a vector)

ans = 5×1

62 64 66 68 70

vertcat(A{2:2:end,7}) * 2 % this works

ans = 5×1

124 128 132 136 140

A{2:2:end,7} * 2 % this doesn't

Error using *
Too many input arguments.