Silly question about 2 column matrix

It is my understanding that

a = [1 3 5; 2 4 6; 7 8 10]

a = 3×3

1 3 5 2 4 6 7 8 10

yet

AL01-SIGMA09 = [1183.885678	512.1;

Incorrect use of '=' operator. Assign a value to a variable using '=' and compare values for equality using '=='.

Error in connector.internal.fevalMatlab

Error in connector.internal.fevalJSON

                568.8329716	512.1;
                417.7853247	512.1;
                200.7327245	512.1;
                38.95699064	512.1;
                19.83313269	512.1;
                14.56665171	512.1;
                8.010756815	512.1]

gives me this error, I can't see the difference. Can someone explain how I create a two column matrix from this data.

Thanks in advance

Alex

Answer 1

[Tushar]

Hello A Poyser,

Please note that the error you are getting is not due to the "=" or "==" operator but it is simply because you cannot use hyphens in variable naming in MATLAB. Change the variable name and you can create the matrix using the very same syntax you provided :) Instead try using underscore.

AL01_SIGMA09 = [1183.885678	512.1;
                568.8329716	512.1;
                417.7853247	512.1;
                200.7327245	512.1;
                38.95699064	512.1;
                19.83313269	512.1;
                14.56665171	512.1;
                8.010756815	512.1]

AL01_SIGMA09 = 8×2

1.0e+03 * 1.1839 0.5121 0.5688 0.5121 0.4178 0.5121 0.2007 0.5121 0.0390 0.5121 0.0198 0.5121 0.0146 0.5121 0.0080 0.5121

[A Poyser]

Tushar, yes I realised as soon as I saw the answer from VBBV. Thanks for the help.

[John D'Errico]

In fact, really this answer gets to the correct point of the problem best. Sadly, it was not accepted as the correct answer. That is a flaw of Answers. But at least I can give it an up-vote. Such is life.

Answer 2

[VBBV]

From the below error, its visible that AL01 & SIGMA09 are both scalar variables and difference between them is also scalar. They have different dimensions when compared with matrix present in RHS & not possible to equate them

AL01 = 3;
SIGMA09 = 2;
AL01-SIGMA09 = [1183.885678	512.1;

Incorrect use of '=' operator. Assign a value to a variable using '=' and compare values for equality using '=='.

                568.8329716	512.1;
                417.7853247	512.1;
                200.7327245	512.1;
                38.95699064	512.1;
                19.83313269	512.1;
                14.56665171	512.1;
                8.010756815	512.1]

[A Poyser]

Ahhhhh. Silly me. It is a naming error. It's one array AL01-SIGMA09 should be AL01_SIGMA09.

Thanks so much.