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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...

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

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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...

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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...

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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...

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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...

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

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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...

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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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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...

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

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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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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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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...

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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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how to efficiently find the indices?
Matlab has a nice function built in for this [B,I,J] = UNIQUE(...) also returns index vectors I and J such that B = A(I...

대략 12년 전 | 1

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eomday extension for wrapping month numbers
eomday([2012, 2013], {3:12, 1:3}) would work like this eomday([repmat(2012,1,10) repmat(2013,1,3)], [3:12 1:3]) Us...

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Matlab Database Toolbox
I don't see a join in the tool you can just write the SQL for it. Generate the M-file from a basic query then just add you join ...

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Error "Too many DATANAMES" for number series
It's definitely not too big. I bring in sets much larger than this all the time. I've never used the FTStool, but sometimes when...

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Ski Jump HELPPPP
I'm pretty sure you want to set up A as the system of linear equations like this A=[0 0 0 1; 1 1 1 1; 0 0 1 0; 3 2 1 0] ...

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deleting selective multiple rows from a data matrix
couple of problems B<2 & B>3 is always false you need to use a logical index to filter rows of A, B is not logical (all...

12년 초과 전 | 0

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vertcat double and cell
you have to convert so you have the same data types. I converted the double to a cell array. results.time=[1:256]'; resu...

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Matlab and Access
It would help to have the error message but if eid12 and dt are numbers (doubles) you have to convert them to strings. Also you ...

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Emailing Images
Is there a way to make it so the image appears in the body of the email instead of an attachment? My image is a created from a ...

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The technique of using "xlsread"
First you have to read in both numbers and txt [num txt]=xlsread('Book2.xlsx','Sheet1') then you can find the cell that ...

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Best Structure for a Trading Model based on Stock Indices
I prefer to use datasets for all of my data, especially if it is coming from Excel. http://www.mathworks.com/help/toolbox/stat...

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given two dates (1/1/2012, 12/1/2012), how to have an array of months (1/1/2011,2/1/2011,...,12/1/2012)??
something like this maybe dv=datenum('1/1/2012'): datenum('12/1/2012'); dv=datevec(dv); dv=datenum(dv(dv(:,3)==1,:))...

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Files on path are inaccessible (sometimes)
I get this error sometimes when I am working on a server and have drives mapped differently. I don't think this is your issue si...

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Image Processing: Array Problem - right justify?!
array(array==0)=NaN are you planning on using nanmean?

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