Path: news.mathworks.com!not-for-mail From: "Sadik " <sadik.hava@gmail.com> Newsgroups: comp.soft-sys.matlab Subject: Re: Problems with plotting lines and curves Date: Fri, 12 Mar 2010 00:51:04 +0000 (UTC) Organization: The MathWorks, Inc. Lines: 36 Message-ID: <hnc35o$q72$1@fred.mathworks.com> References: <hnbndh$2uk$1@fred.mathworks.com> Reply-To: "Sadik " <sadik.hava@gmail.com> NNTP-Posting-Host: webapp-03-blr.mathworks.com Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Trace: fred.mathworks.com 1268355064 26850 172.30.248.38 (12 Mar 2010 00:51:04 GMT) X-Complaints-To: news@mathworks.com NNTP-Posting-Date: Fri, 12 Mar 2010 00:51:04 +0000 (UTC) X-Newsreader: MATLAB Central Newsreader 1666517 Xref: news.mathworks.com comp.soft-sys.matlab:616121 Hi Andrew, Why not collect the line and the curve in two separate vectors? You should also collect the corresponding depth info so that you will say: plot(hLine,linePoints) hold on plot(hCurve,curvePoints,'r') or something like that. Best. "Andrew Cross" <butross@hotmail.com> wrote in message <hnbndh$2uk$1@fred.mathworks.com>... > Hi, > > I'm fairly new to Matlab and am having some problems with plotting functions. > I've got two functions that I want to plot. One is a line, the other is a negative exponential curve. Both functions are calculated with depth simultaneously, but I only want to display one of the functions at each given depth (i.e. when the line function has a value less than that of the curve, I want it to plot the line, but when the curve becomes less than the line, I want to only plot the curve). > > If I do this within the for loop, it only plots the points at which depth is calculated (h = 0:0.1:40) - is there any way to join these points to form a solid line? The code is: > > if (var2(:,n) < var3(:,n)) > plot(var2(n),h(n),'linewidth',1); > legend('Straight line'); > else > plot(var3(n),h(n),'r','linewidth',1); > legend('Curve'); > end > > Otherwise, if I place the plot function outside the for loop, the 'if' function doesn't work and only plots whichever function is least at the maximum depth. > > Any help really would be very much appreciated! > > Cheers, > > Andrew