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Error in using prctile, not enough input arguments.

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Hazhan Majeed
Hazhan Majeed on 18 Mar 2021
Commented: Michael Soskind on 18 Mar 2021
hello
dose anyone knows why i get this error message (error in using prctile,line 54 not enough input arguments)? I am trying to run this code but I am ery new to using Matlab.
for i=1:length(A)
Pks{i}=CPM_peak_chkcai(Q(:,i),p1(i),p2(i),p3(i),p4(i),BF{i}.RePs,BF{i}.f,BF{i}.Qelp);
minPeak = prctile(Q(:,i),prctile);
Pks{i}(Q(Pks{i})<minPeak)=[];% revised 1, to remove small floods
% Formation of flow hydrologic events
Pks{i}(Pks{i}<min(BF{i}.RiPs))=[];% revised 2, remove peaks has no rising part due to the limited time span.
Pks{i}(Pks{i}>max(BF{i}.RePs))=[];
FE{i}=CPM_FE_chkcaiV2(Pks{i},BF{i}.RiPs,BF{i}.RePs);
% FE{i}=CPM_FE(Pks{i},BF{i}.RiPs,BF{i}.RePs);
end
% S=matfile([path 'RFE_Swift'],'Writable',true);
% S.FE=FE;
sh=cell(1,length(A));
eh=cell(1,length(A));
for i=1:length(A)
%% moved from Events_Matching5
% rules to remove events with high start or end flow
if ~isempty(FE{i}.MPEs)
mph=zeros(size(FE{i}.MPEs,1),1);% peak locations of multi-peak events
for ie=1:length(mph)
[~,mph(ie)]=max(Q(FE{i}.MPEs(ie,1):FE{i}.MPEs(ie,2)));
mph(ie)=mph(ie)+FE{i}.MPEs(ie,1)-1;
end
indexRemove=Q(FE{i}.MPEs(:,1))./Q(mph)>IBFIm(size(IBFIm,1),i) | Q(FE{i}.MPEs(:,2))./Q(mph)>IBFIm(size(IBFIm,1),i);
FE{i}.MPEs(indexRemove,:)=[];
FE{i}.MPEP(indexRemove,:)=[];
MPEs1=FE{i}.MPEs(:,1);
MPEs2=FE{i}.MPEs(:,2);
else
MPEs1=[];
MPEs2=[];
end
if ~isempty(FE{i}.SPEs)
sph=zeros(size(FE{i}.SPEs,1),1); %peak locations of single-peak events
for ie=1:length(sph)
[~,sph(ie)]=max(Q(FE{i}.SPEs(ie,1):FE{i}.SPEs(ie,3)));
sph(ie)=sph(ie)+FE{i}.SPEs(ie,1)-1;
end
thanks
  1 Comment
Michael Soskind
Michael Soskind on 18 Mar 2021
Hello Hazhan,
Although your code cannot be run as you have provided, and there are not 54 lines of code in the sample, it looks as though you have a variable prctile, which also happens to be a built in matlab function. You should limit this ambiguity. The line I am referring to is the one below.
minPeak = prctile(Q(:,i),prctile);
Let me know if changing the prctile variable to a different name and initializing it helps.

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Answers (1)

the cyclist
the cyclist on 18 Mar 2021
This line is confusing to me, and is likely where the problem is:
minPeak = prctile(Q(:,i),prctile);
You are trying to use prctile as both a function and a variable name. As the argument to the function, you should instead use a value (lilke 95), or a different variable name, like prctVal.

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