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# Mark Whirdy

Actif depuis 2012

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A répondu
Split matrix across the median
a = rand(5,10); b = repmat(median(a,1),10); c1 = a; c1(a<b) = NaN; c2 = a; c2(a>=b) = NaN; .... what you're lookin...

plus de 10 ans il y a | 0

A répondu
In semi-pseudo code below My_array = []; % container for all file contents for i = 1:size(Name_File_Array) fid = fope...

plus de 10 ans il y a | 0

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Convert an acceleration time graph, into a velocity time graph.
I'm not sure its a matlab issue as such but you'd need to know the starting velocity at least. If we assume its zero, then I thi...

plus de 10 ans il y a | 0

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Hi Bob Can you read the contents of all files into matlab in loop, vertically concatenating the cellarrays and perform a sing...

plus de 10 ans il y a | 0

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computation for each date
doc xlsread doc movavg doc accumarray

plus de 10 ans il y a | 0

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from cell array to numeric vector
MWDIData_pop(1,1:5) = {[3752373],[3876616],[4006236],[4140773],[4279524]}; % square brackets in a cellarray indicates that t...

plus de 10 ans il y a | 2

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A répondu
from cell array to numeric vector
yearCellArray = {'2008';'2009';'2010'}; yearVector = cellfun(@str2double,yearCellArray);

plus de 10 ans il y a | 1

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Can I use this formula??
not really a matlab question, google it

plus de 10 ans il y a | 1

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How to vectorize a find
a temporary vector of row numbers, then use your vector-of-interest & a logicsl statement to index this row-number vector ...

plus de 10 ans il y a | 0

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How can we achieve interfacing of two GUI's?
if you just put the name of gui2 inside the callback of the pushbutton of gui1, then gui2 does not open? gui1_mybutton_...

plus de 10 ans il y a | 0

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How to store matrix values in a vector?
Hi Peter Finding it a little difficult to totally grasp what you want to do e.g. m is a 3d matrix & not a 2d one, right? M...

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A répondu
memory leak using activex to save multiple excel files
are you not closing the workbooks?

plus de 10 ans il y a | 0

A résolu

Remove the vowels
Remove all the vowels in the given phrase. Example: Input s1 = 'Jack and Jill went up the hill' Output s2 is 'Jck nd Jll wn...

presque 11 ans il y a

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Check if sorted
Check if sorted. Example: Input x = [1 2 0] Output y is 0

presque 11 ans il y a

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Find all elements less than 0 or greater than 10 and replace them with NaN
Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...

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Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

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Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

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A résolu

Project Euler: Problem 1, Multiples of 3 and 5
If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23...

presque 11 ans il y a

A résolu

Is my wife right?
Regardless of input, output the string 'yes'.

presque 11 ans il y a

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Remove any row in which a NaN appears
Given the matrix A, return B in which all the rows that have one or more <http://www.mathworks.com/help/techdoc/ref/nan.html NaN...

presque 11 ans il y a

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Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

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Column Removal
Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...

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Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

presque 11 ans il y a

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Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

presque 11 ans il y a

A résolu

Reverse the Words (not letters) of a String
*Description* Change the words of a string such that the words appear in reverse order. You may assume that the string is a n...

presque 11 ans il y a

A répondu
remove numbers from a name
welcome to the frustrating world of regular expressions!! regexp(name,'[a-z]\w+','match') all the best, Mark

presque 11 ans il y a | 2

A répondu
Vectorize double loops with constraints on the indexes
Hi Anne-Claire I can make some progress in the vectorization here (code below) but there are a few issues. 1) The r=max(k-...

presque 11 ans il y a | 0

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How to overcome the error message in the script below -Matrix dimension error - due to different size array manipulation
Hi Jan The error I get is ??? Index exceeds matrix dimensions. Since PT_mj is a [3*4] matrix and we are trying to...

presque 11 ans il y a | 0