Why am I getting error while running code of mathworks website?

 load sunspot.dat
 year=sunspot(:,1);
 relNums=sunspot(:,2);
 findpeaks(relNums,year);
 xlabel('Year');
 ylabel('Sunspot Number')
 title('Find All Peaks');

I am getting below mentioned error. Why is it so?

 Error using uddpvparse (line 122)
 Invalid Parameter/Value pairs.

 Error in findpeaks>parse_inputs (line 84)
 hopts = uddpvparse('dspopts.findpeaks',varargin{:});

 Error in findpeaks (line 59)
 [X,Ph,Pd,Th,Np,Str,infIdx] = parse_inputs(X,varargin{:});

Code Source

[Walter Roberson]

What is class(relNums) and class(year) ?

[Explorer]

I did not get your question. What is class?

[Explorer]

I am getting same error when I tried to run another code from MATLAB Documentation .

data = [25 8 15 5 6 10 10 3 1 20 7];
plot(data)

pks = findpeaks(data)

findpeaks(data)

x = linspace(0,1,1000);

Pos = [1 2 3 5 7 8]/10;
Hgt = [4 4 4 2 2 3];
Wdt = [2 6 3 3 4 6]/100;

for n = 1:length(Pos)
    Gauss(n,:) =  Hgt(n)*exp(-((x - Pos(n))/Wdt(n)).^2);
end

PeakSig = sum(Gauss);

plot(x,Gauss,'--',x,PeakSig)

[pks,locs] = findpeaks(PeakSig,x);

findpeaks(PeakSig,x)

text(locs+.02,pks,num2str((1:numel(pks))'))

Is this because of older version of MATLAB? I am using MATLAB R2013a.

Answer 1

[John BG]

there is a uppvparse related compiler bug fix report 452577 (release 2008b) in

http://uk.mathworks.com/support/bugreports/452577?s_tid=srchtitle

I tried the sunspot.dat initial lines and work fine in R2015.

There are 4 findpeaks related bugs 650368(2010b), 582260(2010a), 452577(2008b) same as above, and 489930(2009a).

I have also tried the code you added later on and no problem in 2015.

If I were you, if not out of experience, just for the cost of a student licence, it really pays off to save a few pizzas and beer, and get MATLAB updated, really.

is this answer helping you in any way to solve your question and take the right direction, please give me a thumbs-up vote by clicking above, next to your question, thanks in advance.

John

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