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How to change both the axis value ranges
Aftab, you could simply data_km = 125 * (data + 1); where |data| would be your current one ranging from -1 to +1 and assu...

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Columns with at least one zero element
Anya, you could use A = [1 2 3 0 8; 5 0 1 2 2]; col = find(sum(A==0)) col = 2 4 |col| shows the columns whi...

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How can I change a quotation mark in a text string readed from an excel sheet ?
Christophe, do you mean: old_str = 'Pression d''injection' old_str = Pression d'injection new_str = strrep(old_str,...

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Saveas plot using name of imported data file.
Samir, how about [pathstr,name,ext] = fileparts(filev); f = fullfile(pathstr,name); saveas(gcf,f)

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Random Matrix to even matrix
Manoj, you could use a = 0:5; b = a - mod(a,2); Note, your vector is a row vector. Use the prime operator to turn it in...

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vertical concatenation of matrices in a loop
Yuvashree, try data = []; for fileNr = 1:8 [...] % removed code for better readability data1...

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How do I control the legend contents when the plot functions are within a for loop?
Brad, see this <http://www.mathworks.com/matlabcentral/answers/129574-how-do-i-select-data-to-legend-in-a-plot#answer_136770 ans...

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I want to see the answers of multi equations, equations are in m file
Alireza, add syms a b c d e f g h i j k l in front of the |solve| command. >> S.a ans = 0.0989281143421615866104...

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Index must be a positive integer or logical
Sebastiaan, the problem is that in A(1,1) = r(n+0.5)/(h^2)+r(n-0.5)/(h^2)+a*r(n) you are trying to access r(8.5) %...

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How to save all trials in Matlab
M, use instead counterclockresponse(k) = getaresponse;

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vpasolve for numerical solution
Richard, it seems the equation you posted cannot be satisfied. 0.95 * 2 * atan((4.5)/(2*r)) * r / (4.5) == 1 or 0.95...

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how to check negative values are there or not in a matrix????
suchismita, use a(a<0) = 0;

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I can calculate two error individually. but i can't calculate two error simultaneously. I found two result individually which is given in below. but i want to merge both error and need a single answer for following code, but i can't. Please help me
Mehedi, how about ideal = [idealx; idealy]; app = [appx; appy]; error = ((abs(ideal-app))./ideal)*100 Simply put ...

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Irregular measurement points and plotting
Merit, you can get started with data = [1,95.5; 3,92.8; 6,90.4; 12,89.7]; plot(data(:,1),data(:,2),'bd') % plot first col...

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Help regarding use of BVP4C in solving an ODE.
AGNIVO, check out: function my_pde() e = 1.602*10^-19; %electron charge [...] %% remove code for ...

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Argument 'range' for ode45
Douglas, to your first question you would choose |linspace| if you want the ode solver to *return solutions at specific times*. ...

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what's the program mistake?
Hello Ali, use instead r = solve(b==0)

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I have a matrix of dimension a=[993,1], I need a matrix b=[331,3] such that every 3 columns of the a forms a row of b
Chris, use b = reshape(a',3,[])'

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Problem identifying a symbolic variable as a double
Dina, did you try isnumeric(double(res)) Just in case this does not result in a "1", what MATLAB release are you working ...

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how to find subsets
Hello, use |nchoosek| A = [1,2,3,4,5,6]; subsA = nchoosek(A,4) for four elements, for example.

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How do I delete an element from a structure?
Douglas, use <http://www.mathworks.de/de/help/matlab/ref/rmfield.html |rmfield|>: k = rmfield(k,'options');

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Is there anyway to exceed plotting 8 data sets in a graph?
Ozgur, check out my_col = jet(20); t = 0:0.1:pi; a = 1:length(my_col(:,1)); y = a'*sin(t); hold all for ii = 1:num...

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bluetooth with LEGO mindstorms EV3
Adham, Bluetooth for the EV3 platform is not yet supported by Simulink.

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Help me about sphere ?
Nguyen, use instead z = real(sqrt(1 - x.^2 - y.^2)); to retain the real part only.

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Why does it gives matrix dimension must agree?
Anwesha, use R = 3e-7:1e-7:10e-7; V = 0.5; Vth = 0.011*V + (1.3e-5*V./R.^2); % note the dot in front of / sign pl...

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How to generate and use different colours on a plot and label as per the colours?
Sameer, something like x = 0:0.1:1; y = sin(x); z = cos(x); plot(x,y,'r-d',x,z,'b-o',x,y.*z,'g-*') legend('x vs y','...

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Error plotting graph, with y behaving similar to step function
You could use something like t = [-5:0.01:5]; y = (t.^2).*(t>0) + 5*(t<=0); yy = 5*ones(numel(t),1); yy(t>0) = t(t>0...

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How to assign different values to different variables input by the user?
Dijesh, you could use the |eval| command: prompt = 'Enter data: '; title = 'Data input'; dlg_ans = inputdlg(prompt,t...

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how to get real quotient in division process?
Saima, not quite sure what you mean, but if you need more significant digits for your answers enter format long in the ...

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Error using taylor to find Maclaurin polynomials
Samious, how about syms x f = exp(x^2); ts = taylor(f, x, 0, 'Order', 5)

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