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# Saeid

Last seen: 6 jours il y a Actif depuis 2016

Professional Interests: Rheology, Polymer Processing, Rubber Mechanics, Polymer Physics, Micromechanics, Finite Difference Method, Finite Element Method, Computational Fluid Dynamics, CFD, Viscoelasticity, Constitutive Modelling, Material Science

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Question

Why does integration of an exponential function generate noisy results as opposed to its analytical solution?
The above question is of course a bit too general, but basically it would be of great advantage to find a way to ensure that num...

8 jours il y a | 1 réponse | 0

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Question

Analytical Solution of Double Integral in Symbolic Math
The following integral is known to have an analytical solution int(sin(x)*(a^2*cos(x)^2 + sin(x)^2/a)^(1/2), x) but Symbolic ...

14 jours il y a | 1 réponse | 0

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Question

Is it possible to decide which line is variable names in readtable?
I want to use readtable to read data from an excel file. As I understand, in readtable, the first line is automatically the vari...

6 mois il y a | 2 réponses | 0

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3D Surface plot of a body for which the xyz coordinates are given
I have an extremely large (in the order of 1-3 million data points) xyz array that defines a body in 3D space. I would like to ...

6 mois il y a | 1 réponse | 0

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Question

Searching for slightly different versions of one string in another string array
I am looking for slightly diffeerent versions of a string S in the array A. For example, the string S that I am searching for ma...

7 mois il y a | 1 réponse | 0

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Question

Finding elements in string or cell array with common strings
Consider two arrays A & B: A={'blah_12_blah' 'blah_456_blah' 'blah_789_blah' 'blah_NPQZ_blah'} B={'blah_NPQZ_blah' 'blah_135_b...

8 mois il y a | 1 réponse | 0

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Question

Is it possible to save 2D or 3D graphics in a common CAD format (STEP File or .dwg file)?
Is it possible to create a 2D or 3D graphic shape in MATLAB and then convert it into a common CAD file?

10 mois il y a | 1 réponse | 0

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Question

Repeating the rows of an array by a number given by another array
Consider the array: x=[linspace(1,4,4)' linspace(5,20,4)'] I would like to repeat each row by a number given by another array...

10 mois il y a | 2 réponses | 0

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Question

Combining a number and a string array (both columns) into a single column string array.
How can the number array: NUMM=linspace(1,10,10)' and the string array: STRR=repmat('X='10,1) be combined to give a string a...

10 mois il y a | 2 réponses | 0

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A répondu
fsolve yields initial guess as solution to non-linear equation
Thank you Davide! This really works, although it is not completely indpendent from the initial guess. Of course I know that an i...

10 mois il y a | 0

Question

fsolve yields initial guess as solution to non-linear equation
I am currently trying to solve a non-linear equation using the following program: clc; format long g; a=0.5; Eta0=100; t12=1e...

10 mois il y a | 2 réponses | 0

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Question

Average number of y for y=f(x) where there are several y values for the same x
I have an array y where y is a function of x but for every x there are multiple values of y. x=[x1 x1 x1 x1 x1 x2 x2 x2 x2 x3 x...

10 mois il y a | 1 réponse | 0

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Question

Identifying numbers within a long string containing multiple occurrences of text and numbers in one row
Read from a text file, my input array contains one row that looks like this: x y z...

11 mois il y a | 2 réponses | 0

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Question

Assigning array-type names to elements of a GUI or App
How can I assign names coming from a string array to the elements of an App? Example: I have the following string array CBNam...

12 mois il y a | 1 réponse | 0

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Question

Finding local minima and maxima of DSC curves using islocalmin and islocalmax
DSC (Differential Scanning Calorimetry) is a thermal analysis method used in material science and chemistry to understand the th...

12 mois il y a | 1 réponse | 0

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A répondu
Shifting one curve to a reference curve using error minimization (fmincon from the Minimization Toolbox)
Hi Mathieu, thanks for the elaborate response and sorry for my late reply. Yes, it worked pretty well! Saeid

environ un an il y a | 0

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Shifting one curve to a reference curve using error minimization (fmincon from the Minimization Toolbox)
I need to shift the red curve ONLY horizontally to overlap with the black one. This should be possible using error minimization ...

environ un an il y a | 3 réponses | 0

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Question

Curve Fitting Using External Function
Using the Curve Fitting Toolbox, is it possible to put the fitting function outside of the fittype? A general example of the way...

environ un an il y a | 1 réponse | 0

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Question

How to recognize discontinuity of slope in numerical data
I am dealing with a set of data that, when plotted, shows a breaking point as shown in circles. How can I identify these points ...

environ un an il y a | 1 réponse | 0

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Question

Solving set of nonlinear equations with multiple roots
I would like to solve the set of nonlinear equations for x & y, where the set of equations if defined in the function "Uniaxial"...

environ un an il y a | 1 réponse | 0

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Question

Complex roots of sin(2*x)-2*x=0
How can i use fsolve to obtain the complex roots of the equation: sin(2*x)-2*x=0?

plus d'un an il y a | 2 réponses | 0

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Question

Delete/remove entire rows and columns containing an element that satisfies a condition (e.g. when the element is an imaginary number)
In an array containing elements that are imaginary numbers, how can I remove the entire row(s) and column(s) containing any of t...

plus d'un an il y a | 2 réponses | 0

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Question

Combining two character arrays so that the elements of one of them is added in between the elements of the other one
I want to combine two character arrays x='ABCDEFGHIJKLMNOPQRSTUVWXYZ' and a='AAAAAAAAAAAAAAAAAAAAAAAAAA' so that A is alte...

plus d'un an il y a | 1 réponse | 0

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Question

Finding the elements within a certain range [XMin, XMax] in every column of an array, then converting all the elements of each column within that range to the minimum of that range
I want to find all the elements within a certain range in every column of an array. For example, I want to find all the elements...

plus d'un an il y a | 1 réponse | 0

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Question

Finding the elements within a certain range [XMin, XMax] in every column of an array, then converting all the elements of each column within that range to the minimum of that range
I want to find all the elements within a certain range in every column of an array. For example, I want to find all the elements...

plus d'un an il y a | 1 réponse | 0

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réponse

Question

Find element satisfying condition in 3D array, then apply operation to all elements in the column number
I have two 3D arrays A & B with I x J x K elements. I want to find all the elements that satisfy a certain condition in A (e.g. ...

plus d'un an il y a | 1 réponse | 0

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Question

Integral of exp(-x)*P(x)/Q(x) in terms of exponential integral in symbolic tooblox
I am trying to find an analytical soltuion to the integral I= int(exp(-x)*P(x)/Q(x),x,0,inf) where P and Q are both polynnomi...

presque 2 ans il y a | 1 réponse | 0

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Question

Shifting datasets using error minimization and optimization
In the field of polymer rheology, it is sometimes necessary to perform tests at different temperatures and then shifting them to...

presque 2 ans il y a | 1 réponse | 0

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