Z must be a matrix, not scalar or vector - SURF

Hello,

Attached is a screenshot of my code and a table I recreated in excel. Just pretend it is in MATLAB. Unfortunaltly, because this is for work, I cannot share actual screenshots, so I made a simplified mock up to show you.

'b' is the variable name I call from.

'c' is just what I call the length of b, which is 12.

The table is a 1x12 structure with 12 fields. For my example, I only show 1 to 5, but you ge the idea to show you where I get the error 'Z must be a matrix, not scalar or vector.'

I appreciate any help/advice. Thanks!

.....

Answer 1

[Sindar]

struct array is a terrible way to store this data. Does this do it?

tbl = struct2table(b);
surf(tbl.temperature,tbl.humidity,tbl.frequency)
% no loop

[Sindar]

The issue with your code is that you are trying to build a surface line by line, but that doesn't make sense to Matlab

[Sindar]

What were you expecting? The x and y values seem to be the same for every row

For homogenous data, tables are so much better. I'm still kinda bitter that I learned Matlab on a (old-at-the-time) version prior to tables, and coded everything up badly with struct arrays, before learning about tables.

[Sclay748]

oh i guess that makes sense. I just was looking for the typical surface looking graph, but you made me realize that haha

[Sclay748]

thank you!