Error using length, Too many input arguments.

6 Ansichten (letzte 30 Tage)
C A
C A am 30 Aug. 2021
Kommentiert: Walter Roberson am 1 Sep. 2021
I have a bunch of data from animal cells at different times. j represents the time frame. I want to extract a field from my object and that field can either have one or two values. If I have one value, I want to extract the value as it is and if I have two values, I want to average them out. This is a snippet of my code.
if length(Obj.MatFile{cellnumber}{j},ExtractField)==2
Answer(icellnumber,i)=mean(Obj.MatFile{cellnumber}{j}.(ExtractField));
else
Answer(icellnumber,i)=Obj.MatFile{cellnumber}{j}.(ExtractField);
end
I keep getting the above error. Any help would be greatly appreciated. Thanks in advance.

Akzeptierte Antwort

Matt J
Matt J am 30 Aug. 2021
Bearbeitet: Matt J am 30 Aug. 2021
The first line shouldn't have any commas.
  3 Kommentare
Matt J
Matt J am 31 Aug. 2021
Ina later line of the code, you have
Obj.MatFile{cellnumber}{j}.(ExtractField)
Shouldn't it be referenced that way everywhere else, too?
C A
C A am 31 Aug. 2021
Thank you. This helps a lot!

Melden Sie sich an, um zu kommentieren.

Weitere Antworten (1)

Stephen23
Stephen23 am 31 Aug. 2021
Bearbeitet: Stephen23 am 31 Aug. 2021
if length(Obj.MatFile{cellnumber}{j}.(ExtractField))==2
But note that you do not need to check the length: taking the mean of one value simply returns that value, so in both cases you can simply do this (and not worry about how many values there are):
Answer(icellnumber,i) = mean(Obj.MatFile{cellnumber}{j}.(ExtractField));
and then get rid of the IF entirely.
  2 Kommentare
C A
C A am 31 Aug. 2021
Thank you. This is the most sensible way to do this. I just wanted to learn how to use 'length' function because I need to remove values if there are more than two.
Walter Roberson
Walter Roberson am 1 Sep. 2021
"if there are more than two" -- use numel() instead of length() if you want to know how many values there are. length() has a slightly different meaning.

Melden Sie sich an, um zu kommentieren.

Kategorien

Mehr zu Data Import and Export finden Sie in Help Center und File Exchange

Produkte


Version

R2017a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by