Creating vectors using variables as endpoints

When attempting to create a vector 't' using the following code:

    for t = RSLT.lag_min+1:RSLT.date_ct;

I receive the following error:

Error using  : 
Colon operands must be in the range of the data type.

RSLT is a 1x1 structwith 18 fields (lag_min and date_ct being among them). Is it feasible to create vector using two variables?

[Kelly Kearney]

What data type (class) are RSLT.lag_min and RSLT.date_ct? Your syntax should work for most, but I'm guessing perhaps your endpoints are different classes that are perhaps not compatible when one is recast to the other.

[Robert Garrison]

The RSLT.lag_min is a int8 and the RSLT.date_ct is a double. I just converted both objects to doubles. Thanks, I was clearly overthinking.

Answer 1

[John BG]

In MATLAB, if you want to use a structure called RSLT that has fields .lag_min and .date_ct first define them like RSLT.lag_min=1 RSLT.date_ct=2

The error message you receive is regarding the . used in MATLAB as element wise to whatever operator preceding.

For instance

A=randi(10,4,4)
A =
     2     1     5     2
     2    10     4     8
     3    10    10     4
     5     5     4     3

 B=randi([-5 5],4,4)
  B =
      -1     5    -2    -4
      -4     1     4     2
      -4    -5    -5     3
       5    -3    -5     2

   A*B
   =
     -16   -20   -35    13
     -18   -24   -24    40
     -63   -37   -36    46
     -26     1   -25     8

A.*B
 =
    -2     5   -10    -8
    -8    10    16    16
   -12   -50   -50    12
    25   -15   -20     6

I applies to all basic operations .+ .- .* and ./

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thanks in advance

John

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