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Tom


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Active since 2012

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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)...

mer än 10 år ago | 2 answers | 0

2

answers

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...

mer än 10 år ago | 1 answer | 0

1

answer

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...

mer än 10 år ago | 1 answer | 0

1

answer

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...

mer än 10 år ago | 0 answers | 0

0

answers

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 ...

nästan 11 år ago | 1 answer | 0

1

answer

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...

nästan 11 år ago | 1 answer | 0

1

answer

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...

nästan 11 år ago | 1 answer | 0

1

answer

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+...

nästan 11 år ago | 1 answer | 0

1

answer

Question


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

nästan 11 år ago | 1 answer | 0

1

answer

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...

nästan 11 år ago | 1 answer | 0

1

answer

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...

nästan 11 år ago | 1 answer | 0

1

answer

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...

nästan 11 år ago | 2 answers | 0

2

answers

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,:...

nästan 11 år ago | 1 answer | 0

1

answer

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...

ungefär 11 år ago | 1 answer | 0

1

answer

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...

ungefär 11 år ago | 0 answers | 0

0

answers

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) -...

ungefär 11 år ago | 1 answer | 0

1

answer

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...

ungefär 11 år ago | 1 answer | 0

1

answer

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 ...

ungefär 11 år ago | 1 answer | 0

1

answer

Question


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

ungefär 11 år ago | 1 answer | 0

1

answer

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...

ungefär 11 år ago | 1 answer | 0

1

answer

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...

ungefär 11 år ago | 1 answer | 0

1

answer

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...

ungefär 11 år ago | 1 answer | 0

1

answer

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 ...

ungefär 11 år ago | 2 answers | 0

2

answers

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? ...

nästan 12 år ago | 1 answer | 0

1

answer

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...

nästan 12 år ago | 1 answer | 0

1

answer

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...

ungefär 12 år ago | 2 answers | 0

2

answers

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...

ungefär 12 år ago | 2 answers | 0

2

answers

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...

ungefär 12 år ago | 2 answers | 0

2

answers

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...

ungefär 12 år ago | 2 answers | 0

2

answers

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...

ungefär 12 år ago | 4 answers | 0

4

answers