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I do not understand exit message given by lsqnonlin,
Note that when you have problems that are more than just bounded variables, so any other set of constraints, then it appears lsq...

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Getting imaginary values as solutions to equations using solve function
P_l=50; v=0.1; k=15; Tm=1375; T0=300; alpha=3.75*10^(-6); E= 190*10^9; h= 100*10^9; G= 150*10^9; nu=0.3; psi= 1- exp(-...

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I am struggling with integrating a function.
Don't use inline functions. They are slow, inefficient things, introduced long ago, in a galaxy far, far away. Instead use funct...

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Finding the first 1 in a binary set using optimization
If V is given, then find(V,1) is perfect, and it will not be improved upon. And you say that V is given! So what is your questio...

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computational complexity of svds
Sorry, but no, we can't tell you why a choice was made. MathWorks does not give out that information. You MIGHT be able to lear...

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Numbers prediction using advanced matlab code
A neural net will use a random start point in the training. Start from a different set of parameters for the net, and you will g...

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Kindly help me understand this code, it is a user defined function for multiplying two polynomials
I'm sorry, but that code is complete crapola. Better code might look something like that below. Test it out. p1 = [2 5 3]; p2...

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Interpolation between 3D data sets. Neural Networks or Other Methods?
What is the "best" method? Impossible to say. To know what defines best, we would need to know EXACTLY what your requirements a...

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elements >0 are present in matrix only once
Count the number of non-zero unique elements. Count the number of non-zero elements. Are those two numbers the same? In either...

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How to make contour smooth
As others have pointed out, you don't want to try to make the contours smooth AFTER the fact. Instead you want to smooth the sur...

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Creating AlphaShape from triangulation dataset
Is there any way? Trivially, yes. Ok, maybe trivial is in the eyes of the writer. I can say this because I have written both 2d ...

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Is it possible to constrain a polynomial fit in MATLAB so that the resulting fit is rotationally symmetric?
No. It is not directly possible to do so, that is, to force the fit to be rotationally symmetric for a general polynomial. Howev...

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How to split a irregular polgon into different parts having specific area for each part?
There is no magical, trivial solution, based on a single call to any function. Why would someone write that anyway? But it woul...

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Solving a system of equations using Symbolic Matlab
You CANNOT use fsolve, though you said you tried it. This is not a numerical problem, but a symbolic one. t is an unknown there....

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very similar dataset and yet 'TRAPZ' function gives very different answers
"Very" different? "VERY"? Lets be serious. xy1 = [1.43155281315397 0.00255865851191916 1.35675838019809 0.0145131910703132 1....

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How would I perform a weighted least-squares regression analysis with x and y error?
Let me see what I can explain. (I think some have missed the point of your question.) These problems are always simpler than yo...

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why does conv2 increase z height?
Easier to just see what is happening with a 1-d problem. First, some data. t = linspace(0,10,200); y0 = sin(t); % about as sim...

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please complete the time series code
It looks complete to me. What do we see? We see uncommented, virtually undocumented code, that does something we are not told ab...

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Plotting variables from an implicit function
fimplicit plots the lines where your function is ZERO in that region. Is it ever zero? Probably not. dmin=0.2; fs=250e3; Vo=40;...

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Apparent distance conservation in Matlab plot window while rotating 3D objects
I'm confused. If you plot two things in 3-d, you change the view using the function view. But OF COURSE things change when you ...

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Generate random integers that sums to a specific number within a specific range
I had to put in my 2 cents here. I saw @Matt J and @Bruno Luong both claim uniformity, or at least close to approximate uniformi...

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Is it possible to restore all the variables from the previous session?
Sure. Just don't exit MATLAB. Or, save your results periodically. Why would you not do that on a long run that takes a week of r...

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find the position of a value in a "Double-precision array"
-10.1333 the EXACT VALUE? NO. All you see is that number written with 4 digits after the decimal point. You need to learn to use...

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Caluclating an integral over a rectangle, with a singularity point.
As is often the case, this is FAR simpler than you think. And, yeah, sometimes things are far more difficult. They never seem to...

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Fill the big gaps in data series
The big probem is, your series has little information content in it. :( And of course, you don't give us any data. So I'll make ...

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1*1835008=1*786432(1024*256*2(1:1024,:,1:2)),[1:256,1*262144)] is run in Matlab or not if not then tell me reason ?
The reason is simple. The = operator is an assignment operator. It assigns whatever is on the right side to the variable on the ...

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Discrepancy between local maxima of cfit and global minima in second derivative
Many issues here. First, estimation of a derivative from noisy data is generally a bad idea, because differentiation is a noise...

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levenberg-marquardt with linear constraints
I'm sorry, but nobody can tell you IF there are any plans to introduce some behavior in a future release, until it is released. ...

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More efficient alternative to find()
Why does max not do what you want? There are TWO returns from max. X = randi(100,[1,10]) [xmax,maxloc] = max(X)

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How to find the linear slope of a set of data points on a graph
There is NO linear section. It is a curve. Viewed over a short enough segment, any curve will appear linear. T=[0 0.250000...

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