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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...

14年弱前

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

14年弱前

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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...

14年弱前

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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...

14年弱前

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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...

14年弱前

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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...

14年弱前

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

14年弱前

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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...

14年弱前

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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 ...

14年弱前

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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 ...

14年弱前

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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...

14年弱前

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

14年弱前

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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.

14年弱前

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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 ...

14年弱前

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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...

14年弱前

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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:...

14年弱前

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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...

14年弱前 | 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...

14年弱前 | 1

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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 ...

14年弱前 | 0

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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...

14年弱前 | 1

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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] ...

14年弱前 | 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...

14年弱前 | 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...

14年弱前 | 0

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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 ...

14年弱前 | 0

質問

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 ...

14年弱前 | 1 件の回答 | 1

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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 ...

14年弱前 | 0

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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...

約14年前 | 0

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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,:))...

約14年前 | 2

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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...

15年弱前 | 0

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

15年弱前 | 1