Error In Fminsearch
Support Support Newsreader MathWorks Search MathWorks.com MathWorks Newsreader Support MATLAB Newsgroup MATLAB Central Community Home MATLAB Answers File Exchange Cody Blogs Newsreader Link Exchange ThingSpeak Anniversary Home Post A New Message Advanced Search Help MATLAB Central Community Home MATLAB Answers File Exchange Cody Blogs Newsreader Link Exchange ThingSpeak Anniversary Home Post A New Message Advanced Search Help Trial software fminsearch: Subscripted assignment dimension mismatch. Subject: fminsearch: Subscripted assignment dimension mismatch. From: Moh Moh (view profile) 1 post Date: 20 Feb, 2012 03:30:13 Message: 1 of 6 Reply to this message Add author to My Watch List View original format Flag as spam Hi everyone, In running the following code, Matlab sends me "Subscripted assignment dimension mismatch Error in ==> fminsearch at 205 fv(:,1) = funfcn(x,varargin{:});" Went over the code several times, yet cannot see what is wrong. Can someone help me out please: clear; N = 1000; rand('seed', 20); income = unifrnd(0,1,[N,1]); income_s = sort(income); t_star = .3; z_bar = 0.4; % set arbitraty z alpha = .2; rho = -100; for i= 500 % I need the loop for some reasons y_i = income_s(i); c = [y_i N rho alpha t_star]; z_star = fminsearch(@(z) u_fn_i(z, c), z_bar); end ============== and here is u_fn_i function ============== function u_fn = u_fn_i(z, c) global income_s; y_i = c(1); N = c(2); rho = c(3); alpha = c(4); t_star = c(5); inv_rho = 1/rho; y_z = quantile(income_s, z); y_star = mean(income_s(income>y_z)); ind = find(income_s
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, https://www.mathworks.com/matlabcentral/newsreader/view_thread/317082 helping each other. Join them; it only takes a minute: Sign up Using fminsearch error up vote -1 down vote favorite I have function: function f=kriteriyLR3(a,w,ft) ye=[0.5 1 2 3.5 4 3.8 2.9 2.5 1 0.3]; t=[0.2 0.3 0.35 1.6 1.78 1.8 2 2.3 2.5 3]; s=0; for i=1:10 s=s+(ye(i)-a*sin(w*t(i)+ft))^2; end f=s; I want to minimize it http://stackoverflow.com/questions/8400730/using-fminsearch-error and I do the following: a=1; w=1; ft=1; x = fminsearch('kriteriyLR3',[], a,w,ft); I receive the folloing errors: >> mainLR3 Subscripted assignment dimension mismatch. Error in fminsearch (line 191) fv(:,1) = funfcn(x,varargin{:}); Error in mainLR3 (line 12) x = fminsearch('kriteriyLR3',[], a,w,ft); As far as I understand the dimensions mismatch, but I have no idea how to fix it. Any help? math matlab share|improve this question asked Dec 6 '11 at 13:33 Igor Filippov 7,8491263128 add a comment| 3 Answers 3 active oldest votes up vote 1 down vote accepted Have you read the help for fminsearch? Your calling syntax is all wrong. I think what you want is: x = fminsearch(@(x) kriteriyLR3(x(1),x(2),x(3)), [a,w,ft],[]); If you look at the syntax you're using, you'll see that you're trying to start from [], which means that funfcn(x,varargin{:}) will return [], which doesn't match the expected size. share|improve this answer edited Dec 6 '11 at 22:26 answered Dec 6 '11 at 16:13 Nzbuu 4,4421639 add a comment| up vote 2 down vote fminsearch will opt
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business http://stackoverflow.com/questions/28100629/fminsearch-multiple-parameters-matlab Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs http://stackoverflow.com/questions/35195060/error-in-fminsearch-line-191-fv-1-funfcnx-varargin Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up fminsearch multiple parameters matlab up vote 0 down vote favorite I'm trying to use fminsearch with multiple parameters but I can't seem to error in even get it working with two. I also tried it using optimalization tool in matlab but then I get: Optimization running. Error running optimization. Not enough input arguments. What i do: fval = fminsearch(@g,[1 1]) The function g looks like this: function r=g(x,y) r=x.^3+3*x*y.^2+12*x*y; end but i get this: Error using g (line 2) Not enough input arguments. Error in fminsearch (line 190) fv(:,1) = funfcn(x,varargin{:}); matlab optimization arguments fminsearch share|improve this question asked Jan error in fminsearch 22 '15 at 23:34 Joanna 33 add a comment| 1 Answer 1 active oldest votes up vote 1 down vote accepted Your function g takes two inputs, x and y, however you supply fminsearch one input, the vector [1 1]. You need to rewrite it so that fminsearch only needs a single vector as input, but then that vector is split into two numbers to input into g. fminsearch(@(v) g(v(1),v(2)),[1 1]) This makes an anonymous function that takes a vector as input (v) and then uses the first element (v(1)) as the first input to g, and the second element as the second input. share|improve this answer answered Jan 22 '15 at 23:41 David 7,43111430 thank you. that's exactly what I was looking for :) –Joanna Jan 22 '15 at 23:51 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Email Post as a guest Name Email discard By posting your answer, you agree to the privacy policy and terms of service. Not the answer you're looking for? Browse other questions tagged matlab optimization arguments fminsearch or ask your own question. asked 1 year ago viewed 2330 times active 1 year ago Related 1Error while
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Error in fminsearch (line 191) fv(:,1) = funfcn(x,varargin{:}); up vote 0 down vote favorite 1 I want to minimize the below function which uses few constants(Hz,h,LR,k,T), but ending up with an error,....Please get me out of this.... I have loaded .rpt file which contains values as shown on top of code.......Thanks in advance. 3.25E+008 9.55E+002 3.03E+008 1.61E+005 2.77E+008 3.35E+005 2.54E+008 1.98E+006 1.17E+008 1.48E+003 1.13E+008 6.20E+004 1.00E+008 7.96E+005 9.15E+007 2.12E+003 format compact format long Hz = 3; h = 3.99E-10; LR = 0.1; k = 8.3145; T = 297.15; load sdata_ndata.rpt count = size(sdata_ndata,1); xdata = zeros(count,1);% Stress ydata = zeros(count,1);% Nf for i=1:count xdata(i) = sdata_ndata(i,1); ydata(i) = sdata_ndata(i,2); end %Function to calculate the sum of residuals for a given p1 and p2 fun = @(p) sum((ydata-(((p(1)*(Hz*h*(1-LR))*xdata)*(exp((p(2))/(k*T))))/(((k*T)^2)*((exp((p(1)*xdata)/(k*T)))-(exp((p(1)*LR*xdata)/(k*T))))))).^2); %starting guess pguess = [1.338463e-003;1.234006e+005]; %optimise [p,fminres] = fminsearch(fun,pguess) matlab fminsearch share|improve this question edited Feb 4 at 7:39 asked Feb 4 at 7:33 vivek 35 looks like a problem in your fun function... but I can't reproduce your mistake because of don't know what is xdata, ydata (can't load sdata_ndata.rpt). Can you show all necessary data for calculation? –Mikhail_Sam Feb 4 at 7:49 Your need to replace the matrix division ...(k*T))))/(((k*T)^2)... by an element-wise division ...(k*T))))./(((k*T)^2).... –Nemesis Feb 4 at 8:12 Thanks Mikhail.......The sdata_ndata.rpt file contains the data shown at the begining of the code. (sdata is in column of 3.25E+008. and ndata is in column of 9.55E+002 ) –vivek Feb 4 at 8:12 BTW: You can write xdata = sdata_ndata(:,1) and ydata = sdata_ndata(:,2) to avoid the for-loop. –Nemesis Feb 4 at 8:16 Yeah.....thanks Nemesis.....it worked like a charm... –vivek Feb 4 at 8:20 | show 1 more comment 1 Answer 1 active oldest votes up vote 1 down vote accepted The error lies in the definition of fun. T