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Tom

Kent

Actif depuis 2012

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Question

Finding structure array entries with certain values
Hello, What is the way to find all structure array entries with specific values? E.g. I tried: find(cell_data.CN == 4)...

environ 10 ans il y a | 2 réponses | 0

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réponses

Question

Undefined function 'sind' for input arguments of type 'sym'.
Hello, Is it not express a symbolic trigonometric function in degrees? It would save me a lot of converting if it is. Kind...

environ 10 ans il y a | 1 réponse | 0

1

réponse

Question

Help with symbolic variables
Sorry, reposting this question again to see if any of you kind folk can help. Hello, I have the following to calculate ass...

environ 10 ans il y a | 1 réponse | 0

1

réponse

Question

Help with symbolic variables
Hello, I have the following to calculate associated legendre polynomials (in terms of angles: http://en.wikipedia.org/wiki/As...

environ 10 ans il y a | 1 réponse | 0

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réponse

Question

Help with a scatter3 plot
Hello, I have: x = -1.0393 0.0844 1.3133 0.1248 1.4003 -0.6345 1.4067 -0.5673 0.4601 ...

environ 10 ans il y a | 1 réponse | 0

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réponse

Question

Simple data conversion help needed
Hello, This is probably very simple. Can anyone tell me where I'm going wrong when using strcmp: I have this user input...

environ 10 ans il y a | 1 réponse | 0

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Question

Assigning a 3D scatter plot to structure array
Hello, Is it possible to assign scatter plots in a structure array which can then be recalled individually? I currently ha...

environ 10 ans il y a | 1 réponse | 0

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Question

User definition of cell contents
Hello, I have a cell which contains 4 'atom types', e.g. all_atom_type = 'Eu3+' 'Na1+' 'O2-' 'Si4+...

environ 10 ans il y a | 1 réponse | 0

1

réponse

Question

Consider preallocating for speed
Hello, My lengthy program is littered with 'Consider preallocating for speed' suggestions for numerous variables. What doe...

environ 10 ans il y a | 1 réponse | 0

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réponse

Question

Find elements of a vector
If I have a vector, e.g. A = [ 2 8 6 5 3 3 6 5 5 3 4 1 2 9 6] How do I return a vector which just gives single examples...

environ 10 ans il y a | 1 réponse | 0

1

réponse

Question

Being more concise with an IF statement
Hello, Could someone tell me if there's a more concise way (I'm sure there is) of implementing the following: if CN(cou...

environ 10 ans il y a | 1 réponse | 0

1

réponse

Question

help using sortrows please
Hello, I can't seem to achieve my desired result of sorting the rows of a matrix into ascending order. The documentation seem...

environ 10 ans il y a | 2 réponses | 0

2

réponses

Question

Skipping calculations using if
Hello, I have the following code: for j = 1:(length(acalc)-1) for ii = (j+1):length(acalc) dotp(count2,:...

plus de 10 ans il y a | 1 réponse | 0

1

réponse

Question

removing a complex infinity
If I have elements in a matrix which are 0 + Infi, what is the best way to delete these elements? I have tried x(x==0+i...

plus de 10 ans il y a | 1 réponse | 0

1

réponse

Question

Help with rowshift needed
I have narrowed down the problem from my previous question. I have a for loop for ashift = 1:n x = [x(:,1) - x(as...

plus de 10 ans il y a | 1 réponse | 0

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Question

For loop help needed
Can anyone see a reason why when I implement the following for loop: for ashift = 1:n x = [x(:,1) - x(ashift) x(:,2) -...

plus de 10 ans il y a | 1 réponse | 0

1

réponse

Question

Nested for Loop needed
Hello, Could anyone enlighten me as to how to produce the for loops required to perform the following: 2 x 3 2 x 4 2...

plus de 10 ans il y a | 1 réponse | 0

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Question

Nested for loop help needed
Hi guys, can anyone help me out with this one: x = A B C D E F G H I J ...

plus de 10 ans il y a | 1 réponse | 0

1

réponse

Question

Plotting two 3D points from a textscan output
I have the following text file: Eu3+ 1 10.06037350 -4.673610300 -1.834337367 ...

plus de 10 ans il y a | 1 réponse | 0

1

réponse

Question

Create 3D scatter plot from matrix
Hello, Could someone enlighten me how to make a 3D scatter plot from a matrix. Specifically, given a matrix of the form: A...

plus de 10 ans il y a | 1 réponse | 0

1

réponse

Question

Converting cell array with various entry types
Hello, I have the following lines of code: fid = fopen('singleatom.txt','r'); %read as a single cell C = texts...

plus de 10 ans il y a | 1 réponse | 0

1

réponse

Question

Need help with textscan
Hello, I've been struggling with textscan for some time now, if anyone could point me in the right direction here I'd be eter...

plus de 10 ans il y a | 1 réponse | 0

1

réponse

Question

Help with textscan classifier
Hello, Trying to extract data from a text file, the data is in the format: Eu3+ 1 10.06037350 -4.673610300 -1.834337367 ...

plus de 10 ans il y a | 2 réponses | 0

2

réponses

Question

Polynomial fitting prob lem
Hello, Would anyone have an idea how to prevent these large peaks and troughs occurring at the edges of a polynomial fit? ...

environ 11 ans il y a | 1 réponse | 0

1

réponse

Question

Headings for graphs generated in a loop
Hello, Can anyone tell me how to go about having separate headings for graphs (and histograms) generated in a loop? Than...

environ 11 ans il y a | 1 réponse | 0

1

réponse

Question

Problem creating a histogram
Hello, I am trying to create a histogram where each bin is the length of the increments in another vector. Can anyone explain...

plus de 11 ans il y a | 2 réponses | 0

2

réponses

Question

Plotting polynomials side by side.
Hello, Is it possible to plot two polynomials next to each other as opposed to on top of each other? The problem being they w...

plus de 11 ans il y a | 2 réponses | 0

2

réponses

Question

Using IF to remove upper and lower boundaries
Within a FOR loop, I can successfully implement a single IF statement to prevent either the upper or lower values from being man...

plus de 11 ans il y a | 2 réponses | 0

2

réponses

Question

Creating a symbolic variable, then using it as a real variable
I need my program to calculate the derivative of a function, and as far as I understand that means I need to make a symbolic var...

plus de 11 ans il y a | 2 réponses | 0

2

réponses

Question

Help with looping problem
Here I am defining x and y coordinates of rays vertically approaching a boundary (currently sin(x)) x = 0:0.1:pi rx...

plus de 11 ans il y a | 4 réponses | 0

4

réponses