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Need help creating simple plot (3d plot?)
Ulrik, one option would be a surface plot: n = 100; x = linspace(0,4,n); y = linspace(0,4,n); [X,Y] = meshgrid(x,y); ...

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Change elements by a set amount.
Justin, do you mean delta = delta - delta/2 + 1 ?

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Find value of x, from max y (graph)
Andrew, check out x = 0:0.1:6; y = sin(x + 0.5); vel = diff(y)./diff(x); plot(x(1:end-1), vel,x(vel == max(vel)),m...

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Row and column lsim error?
Hello Raymond, the system has two inputs, therefore the input signal needs to be a 2-by-n vector. Use, e.g. ... t = 0:0.01...

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Problem using Left Hand Division in MATLAB
Michael, the answer (zero-vector) is correct. If you do rank(sysEq) you'll see that the matrix has full rank (= 3). This ...

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Repeating triangular block in Simulink
Chess, how about using the <http://www.mathworks.com/help/simulink/slref/signalbuilder.html Signal Builder> block?

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Indexing cannot yield multiple results error
Ole, the problem is in this statement vx = vx + ax*dt vy = vy + ay*dt These should be two separate statements. Change it ...

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Lego mindstorms NXT support package
Nauman, in MATLAB simply go to |Resources > Add-Ons > Add Hardware Support Packages|, select and download the NXT package for fr...

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How do I plot this function in MATLAB?
Michael, use something like [x,y] = meshgrid(0:0.1:5,0:0.1:5); Z = sin(sqrt(x.^2 + y.^2))./(sqrt(x.^2 + y.^2)) ; surf(x,...

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Second Y-axis on the figure window
Aftab, use |<http://www.mathworks.com/help/matlab/ref/plotyy.html plotyy>|. Alternatively, use <http://www.mathworks.com/help/ma...

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Problem with using lsim which lead to row and column error ?
Hello Raymond, your system has two inputs, therefore |w| needs to be a 2-by-n array, rather than a 1-by-n. Use instead: ... ...

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How to move a circle on a sine curve?
Airas, use something like ... h = fill(x,y,'y'); axis ([0,200,0,50]) axis equal axis manual for ii = 0:200 ...

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Plotting multiple graphs in one plot.
Hello anton, there is no attachment. But if you can plot one curve, you can do several as well: t = 0:0.1:1; a1 = rand(...

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Error occurs while executing state space parameters using idss?
PARASSURAM, check the size of the matrices. It looks like your |D| matrix needs to be a 1-by-2 (rather than a 1-by-1). |K| sh...

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Getting a mean of only the numbers
Evelyn, use mean(data(~isnan(data)))

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Bug in R2014b? Markersize specifier resets marker type
Hello Wouter, the default <http://www.mathworks.com/help/matlab/ref/plot.html#inputarg_LineSpec marker size> is 6. So you probab...

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Why isn't this plot looking correct?
Tyler, I am not sure what you are looking for. However, it seems like you did get what the exercise is asking for. Note, that th...

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Why is laplace not working?
Hilary, you probaby do not have the Symbolic Math Toolbox installed and/or licensed. At the MATLAB command prompt type which...

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How to define which variable is x and which variable is y axis?
John, simply use plot(b,c) The first argument is the |x| the second the |y| axis. Or, if you want to show both solution b...

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i am getting an error as Attempt to call constructor image with incorrect letter case.
Vetri, see this <http://www.mathworks.com/matlabcentral/answers/38498#answer_47982 answer> reference.

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How to print the second largest of a group of the numbers
Rodrigo, you could use a = [1 2 3 4 5 6 7 8 9 10]; b = max(setxor(a,max(a)));

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Matlab questions from newbies.
Eugene, MATLAB does not know about units and only takes care of the numerics. In other words, you need to make sure that the uni...

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How can I use greek symbols in plot labels?
Merve, you mean something like lambda = 20:5:40; y = 1./lambda; plot(lambda,y) xlabel('{\lambda}') set(gca,... ...

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i want to use fonction(unique) to get un string ,but it awlays shows Error using cell/unique?Can anyone tell me what I am doing wrong here? thank you
pengcheng, use P = [pa(1),pa(2),pa(3),pa(4),pa(5)]; H = unique(P); instead.

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How can I write this function so I can use it on multiple values?
Use bmi = (w*4.88)./h.^2 instead. Note the dot in front of the forward slash.

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Latex Interpreter - mean bar with subscripts
Use ylabel('$\bar{C}_{p_{A_L}}$','FontAngle','italic','Interpreter','Latex')

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getting wrong values when coding
Guan-Yu, use instead scale = 0; quiver(x,y,u,v,scale) This turns off the automatic scaling of the arrows.

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approximating pi with taylor series expansion to the 10,000th term
charlotte, you are almost there: l = 1; for ii = 1:10000 l = l + ((-1)^ii)/(2*ii + 1); end x = 4*l; * If the n...

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Is it possible to check which part of the script is taking longer time for execuation ?
Prathamesh, you are looking for the <http://www.mathworks.com/help/matlab/matlab_prog/profiling-for-improving-performance.html P...

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please explain this error
dav, I believe what you are trying to do is the following max([-3/2, 7, 1.4]) The values you want to find the maximum of ...

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