![]() ![]() To display information of about a function, use the help command, for instance help perform_wavelet_transf.īasic programming constructions include for, while and switch instructions.įor i=1:3 % repeat the loop for i=1, i=2, i=3Įnd Load and visualize signals and images Max(A(:)) % max of a matrix % threshold to 0 values below. #Norms in scilab code% The equivalent Scilab code is % b($-2:$) = 1 ī(end-2:end) = 1 % to access the last entries % The equivalent Scilab code is % b = b($:-1:1) Īdvanced instructions disp( 'Hello') % display a textĭisp( sprintf( 'Value of x=%.2f', x) ) % print a values with 2 digitsĪ(:) % flatten a matrix into a column vector Is is possible to access directly the last entry of a vector using the keyword end in Matlab and $ in Scilab. ![]() * (b>2) % set to zeros (threshold) the values below 2ī(3) = % suppress the 3rd entry of a vectorī = % create a matrix of size 2x4 You can modify matrices and arrays in various way. % You can apply functions to each entry of a matrixĮ = sin(A) % sinus is applied to each entryĮ = abs(A + 1i*C) % modulus of each entry To actually multiplies each entry of a vector, you need to use. :norm(x) or norm(x,2) is the largest singular value of x (max(svd(x))).: :norm(x,1) The l1 norm x (the largest column sum : max(sum(abs(x),’r’))).: :norm(x,’inf’),norm(x,inf) The infinity norm of x (the largest row sum : max(sum(abs(x),’c’))).: :norm(x,’fro’) Frobenius norm i.e. The multiplication operator * is the matrix multiplication. You can create pre-defined array using some basic functions % identity, 1 and random matrices % display the sub-array containing entries 1 and 2 You an acess one entry of an array, or select a sub-array by indexing. a = 1 a = 2+1i % real and complex numbers It is thus very important, in all the numerical tours, to replace % comments by // comments if you are using Scilab. One of the main difference is that Matlab uses the character % to write comments, whereas Scilab uses the C-like syntax //. Matlab and Scilab are very similar languages. Then you can add the toolboxes to the path. getd = % scilab users must *not* execute this Then, simply run exec('numericaltour.sce') (in Scilab) or numericaltour (in Matlab) to run the commands.Įxecute this line only if you are using Matlab. Recommandation: You should create a text file named for instance numericaltour.sce (in Scilab) or numericaltour.m (in Matlab) to write all the Scilab/Matlab command you want to execute. You need to unzip these toolboxes in your working directory, so that you have toolbox_signal and toolbox_general in your directory.įor Scilab user: you must replace the Matlab comment '%' by its Scilab counterpart '//'. #Norms in scilab downloadYou need to download the following files: signal toolbox and general toolbox. Installing toolboxes and setting up the path. Installing toolboxes and setting up the path. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |