Hello,
With investigation into the Fzero function, it seems you're producing a nonscalar fx. This leads me to believe that the problem lies with your function initialization, specifically with the Re. When you include a vector in a function initialization, and use a function that searches for a value that produces 0, it won't succeed because it's attempting to check a single value, not multiple. The error you are encountering is when a matrix/vector is put into a check meant for a scalar.
To avoid this, define your function to produce a single value when evaluated, which means you cannot have vectors or matrices (Re) in your function definition.
If you are sure that your function needs to remain as is, you can overwrite the fzero function to accommodate by doing as follows:
- edit fzero
- Replace all && with & and | | with | (use command f for search and replace)
Once you have done this, fzero will evaluate it as you have above.
f=fzero(@(f)((1/sqrt(f))+2*log10(G/3.7+2.51./(Re*sqrt(f)))),f0)
f =
0.0125
Hope this helps!
