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Nathan Greco


Actif depuis 2011

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A résolu


Basic arrays operations.
Apply element-by-element binary operation 'fun' to two arrays (A and B).

presque 7 ans il y a

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Deleting an element in a matrix
For vector Grades=[98 56 78 34 100 88 87], delete the number 78 to get the following matrix Grades=[98 56 34 100 88 87] **re...

presque 7 ans il y a

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Fibonacci sequence
Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: Inpu...

presque 7 ans il y a

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Most nonzero elements in row
Given the matrix a, return the index r of the row with the most nonzero elements. Assume there will always be exactly one row th...

presque 8 ans il y a

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Weighted average
Given two lists of numbers, determine the weighted average. Example [1 2 3] and [10 15 20] should result in 33.333...

presque 8 ans il y a

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Triangle Numbers
Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

presque 8 ans il y a

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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:...

presque 8 ans il y a

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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...

plus de 11 ans il y a

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Finding Perfect Squares
Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...

plus de 11 ans il y a

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Determine whether a vector is monotonically increasing
Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...

plus de 11 ans il y a

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Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

plus de 11 ans il y a

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Swap the first and last columns
Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...

plus de 11 ans il y a

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Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Example...

plus de 11 ans il y a

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

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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 ...

plus de 11 ans il y a

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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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Add two numbers
Given a and b, return the sum a+b in c.

plus de 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 ...

plus de 12 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...

plus de 12 ans il y a

Réponse apportée
for loop
The only thing that doesn't look right to me is where you have elseif size(qq)==[1,#] / size(qq)==[1,#+1] Where # is 6...

plus de 12 ans il y a | 0

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Store fllepath in variable
Yes. Just store it as a string. filepath = 'C:\Users\ecorbett\Documents\MATLAB\Labelers\fred'; filename = 'text.csv'; ...

presque 13 ans il y a | 1

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Determining Host ID
Does this help? http://www.mathworks.com/support/solutions/en/data/1-171PI/

presque 13 ans il y a | 0

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How do I access and modify only the non diagonal entries in a matrix?
If tmp is your matrix, try: tmp-diag(diag(tmp)) %works only with square matrices OR triu(tmp,1)+tril(tmp,-1) Both of...

presque 13 ans il y a | 0

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How did you learn MATLAB?
I started Matlab by being thrown into it through my internship at Sandia Natl. Labs two years ago. I learned how to program in M...

presque 13 ans il y a | 0

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Changing the names of text files in a directory
Maybe this will do? (Run this under your NAIC directory.) Assuming you are on a windows machine: files = dir('*.txt.*'); na...

presque 13 ans il y a | 1

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Nested loop problem !
Will this do what you are looking for: *EDIT:* a(:,3:end) = b(:,1:end-2); OR, if you really wanted a for loop: d = ...

presque 13 ans il y a | 1

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Finding diag of two cells
Does this work for you? diag(cell2mat([a b])) Note that the solution is the same as: diag([a{1} a{2}]) To get the di...

presque 13 ans il y a | 0

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changes of data
You would not be able to use a matrix, as matrices can only contain the same data types (all numerical or all character arrays) ...

presque 13 ans il y a | 0

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Marking where one clicked with ginput
I did something similar to this when measuring diameters of soot particles. I would frequently get lost as to where I last click...

presque 13 ans il y a | 1

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Control Break Processing
Here's a dirty method, but no handwritten loops as requested. Assume tmp contains your 22x3 cell array of data (the 4th column ...

environ 13 ans il y a | 0

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