Finding X value value at y value?

In matlab is it be possible to find x values at specific y value, just as we did for finding y value at specific x value by using interp1

y2 = interp1(x,y,x0) 

One way I did it is

x2 = interp1(y,x,y0) 

but its not giving me a suitable result ...

[madhan ravi]

"but its not giving me a suitable result ..."

How? and why?, illustrate with a sample data.

[Image Analyst]

Read this link

Then

1. ask an actual question
2. give us your data
3. tell us what other ways you tried
4. tell us why the one way you tried (and the others) is not suitable.

Answer 1

[Jan]

I guess you are looking for fzero().