Match function in matlab

Hello,

I am looking for a function that corresponds to the excel "match" function.

I have an array of (n,32) where n is sated in for loop function as a number of completed loops (so it differs).

DataOutput = zeros(length(phiAStart:phiAStep:phiAEnd),32);

I would like to find the smallest value in column 32 (y) and get the corresponding value in column 1 (x) where y=f(x).

DataOutput(colector,1) = x;   
DataOutput(colector,32) = y;

I can not resolve a function (to get x) having y because it's numerically calculated polynomial so I thought about something similar that MATCH function from excel.

Is there any similar function in Matlab or simple script that can be introduced?

I will be thankful for any suggestions or codes that may work.

Answer 1

[Mateusz Brzezinski]

number = min(DataOutput(:,32));
position = find(DataOutput(:,32)==number);
matchingx = DataOutput(position,1)

Works just fine

[Steven Lord]

That will give you all the matching x values. Do you want that or do you want the first such match?

[Mateusz Brzezinski]

Ok, so what I have is 3rd derivative (f''') from fuction (f)

f''' always has only one root. I just assigned absf'''=abs(f''') to (DataOutput(colector,32)) so it flips negative values of f''' and I am looking for smalest value of absf''' and code above returnes me only one abs(f''') value.

Answer 2

[Steven Lord]

Call the min function with two outputs. Use the second output to retrieve the corresponding value.

[Mateusz Brzezinski]

Ok, thanks but how should it be done?

Answer 3

[Melissa Rosa]

2x+4y