Mode vi return NaN

[NTT]

I am using the mode function to calculate the mode value of an array and it returns NaN. LabVIEW help says it only returns NaN when array input is empty. I am not sure why this happen. My array is

0.00015

0.000114

0.000146

0.000188

0.000139

I did try with mulitple value of intervals.

Thanks in advance.

[Kyle97330]

I think your number of intervals needs to be less than or equal to the input array size.

If you set it to a negative number then it should always return the most commonly occuring value instead of using bins.

[NTT]

Kyle97330,

I have just tried to use -1 but it is still does not work.

I am not sure NaN means it cannot find the repeat value or not.

[BowenM · Accepted solution]

NaN in this case means that no mode was found.  Look at it this way... you have a group of numbers and are telling LabVIEW to break it up into 1000 separate "bins". If each bin has only 1 value in it, then there is no mode - no single value that appears more often than other values.

For your data set, any number of intervals < = 14 will return a mode.  Any > 15 will return NaN.

[GerdW]

Hi NTT,

I did try with mulitple value of intervals.

For interval = [1, 10] it works nicely - means it gives an output different to NaN…

[NTT]

Thanks Bowen,

Actually I have just found out the answer by using the historgram. It illustrated the reason very clear to me.

[NTT]

Thanks Gred, I got this now.