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Skip error message in solving multiple ODEs in a loop
I am trying to solve a number of differential equations having the same form but varying parameters. E.g.: for n=1:np % np...

6 years 前 | 0 个回答 | 0

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Looking for empty spaces in input array from excel
I read data from an excel file with both text and numerical data, and I would like to detect the empty spaces between the rows. ...

6 years 前 | 1 个回答 | 0

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Identifying blocks of data in excel data input
I need to read data from large excel files that are composed of smaller blocks that are typically separated by free spaces and h...

6 years 前 | 0 个回答 | 0

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Looking for string sequence within excel table with an unidentified number of spaces inbetween characters
Let's assume that I am looking for the sentence: "This sentence has 27 characters" inside a large excel table, which i...

6 years 前 | 1 个回答 | 0

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Finding cells with specific string in cell array and substituting them
In a cell array named CC I search for a specific string, ' -' and I want to substitute the contents of all those cells with some...

6 years 前 | 2 个回答 | 0

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Cinditional if for array
I want to activate some function on two matrices (e.g. multiply them) depending on the condition that two matrices A & B are no...

6 years 前 | 1 个回答 | 0

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Curve Fitting Using Outside Parameter
I am trying to find a fit to a set of (X,Y) data where X varies between 0.001 & 1000 and the form of the fit functions is as sho...

6 years 前 | 1 个回答 | 0

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Inserting multiple columns into an existing matrix in equal distance
I would like to break down the red matrix (see below) into 3 columns and insert each column in equal distance into the yellow on...

6 years 前 | 1 个回答 | 0

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Adding numerical array to cell array
I have a cell array of the form: C={'Tom', 'Student', 'Jim', 'Faculty', 'Clare', 'Student'} and a numerical array of the...

6 years 前 | 1 个回答 | 0

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Solving Boundary Value Problem in 2D
I am trying to solve the 2D boundary value problem (energy equation for non-isothermal flow of non-newtonian fluids) inside a ch...

7 years 前 | 1 个回答 | 0

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Diluting large arrays by eliminating columns whose numbers are factos of an integer
Dealing with a numerical problem, sometimes my program ends up producing large data arrays(e.g. 100X1000). Due to numerical limi...

7 years 前 | 1 个回答 | 0

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Looking for multiple string subjects within excel input array
I have a table composed of string and numerical entries: <</matlabcentral/answers/uploaded_files/92271/StringSearch.png>> ...

7 years 前 | 1 个回答 | 0

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Equalizing array of uknowns with a known array
I have a vector of known values such as V=[0.012 2 0.47 100] and I wnat to assign these values to parameters from a different ma...

7 years 前 | 3 个回答 | 0

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Creating vector from another vector containing 2x2 matrix indices
I have an MxN matrix A. I can find the minimum of values in each column of A by: [Amin imin]=min(A(1:end),:) where imin is the...

7 years 前 | 1 个回答 | 0

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creating multidiagonal matrix from a basic square matrix
For a finite difference code I need to create a multidiagonal matrix from a basic square matrix A: <</matlabcentral/answers/u...

7 years 前 | 1 个回答 | 0

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Histogram Data for mXn data matrix
I have an nxn array for which I can easily draw a histogram, but if I want to perform further statistics on the data I need to k...

7 years 前 | 1 个回答 | 0

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Obtaining width of section along a line in contour plot
I use _ginput_ to select a hanful of points on a contour plot, created from xyz data. Now I want to create a vector that e.g. ...

7 years 前 | 1 个回答 | 1

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Values of selected array indices
Imagine an array A of the form: <</matlabcentral/answers/uploaded_files/85273/array.png>> I would like to select certa...

7 years 前 | 2 个回答 | 0

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Parameter vectors outside integration function
I am trying to calculate a double integral with three varibales in the form of a vector AB and another scalar B also as a pareme...

7 years 前 | 1 个回答 | 0

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Solving 3 integral equations to obtain 3 parameters appearing in integrands
I have a series of integral equations: <</matlabcentral/answers/uploaded_files/76442/IntegralEq.png>> Where f, g, and h ar...

7 years 前 | 0 个回答 | 0

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Skipping fzero error in a loop
I am trying to solve an algabraic equation with two parameters that are varying in a loop. The basic form of the program is as f...

7 years 前 | 2 个回答 | 0

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Create Sparse Finite Difference Matrix without Loop
In dealing with a finite difference problem over a 1-D domain composed of i nodes, I am trying to create a sparse matrix of elem...

7 years 前 | 1 个回答 | 0

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Function as sum of functions in fsolve
I want to solve a set of nonlinear equations over two unknowns x(1) & x(2), e.g. in the form: <</matlabcentral/answers/upload...

7 years 前 | 1 个回答 | 0

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xlsread with file names in arrays
I have 3 excel files with following names 'Input1.xls' 'Input2.xls' 'Input3.xls' Is there a way to define an arr...

7 years 前 | 1 个回答 | 0

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Perofrming statistics over non-zero elements of mXn array
I would like to perform statistics, e.g. averaging (or any other function, for that matter), over the non-zero elements of an _m...

7 years 前 | 1 个回答 | 0

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fslove Equation with variable coefficients
Using fsolve, I want to solve a non linear set of equations such as k*exp(-exp(-(x(1)+x(2)))) - x(2)*(1+x(1)^2)=0 x(1...

7 years 前 | 1 个回答 | 0

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Recognizing empty spaces in excel file
Imagine a section of an Excel file of the form shown below: <</matlabcentral/answers/uploaded_files/68269/excel.png>> I ca...

7 years 前 | 1 个回答 | 0

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Adding String to Table in App Designer
I try to add a string array into a table in a simple MATLAB app and all it shows is the NaN text in cells. Do App Designer table...

7 years 前 | 0 个回答 | 0

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Finding Indices of Cells Containing Certain Text in Mixed Arrays (Both Numbers and Strings)
I sometimes have to deal with excel files that contain columns of the following format: <</matlabcentral/answers/uploaded_fil...

7 years 前 | 1 个回答 | 0

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Coefficient Matrix for Savitzky-Golay Data Filtering
Starting from a polynomial coefficient vector such as: [-3/35 12/35 17/35 12/35 -3/35] I would like to create a coefficient ...

8 years 前 | 1 个回答 | 0

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