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Question

Canonical Correlation Analysis - canoncorr function in matlab

I am just starting with CCA, I am trying to explore it using the matlab function, but I guess I am stuck understand the result I...

mer än 11 år ago | 1 answer | 0

### 1

answerQuestion

Understanding output of perfcurve

[X,Y,T,AUC2,OPTROCPT] = perfcurve(classtest,classpredict,2); My classtest as well as classpredict are 460*1, but when i run ...

ungefär 12 år ago | 1 answer | 0

### 1

answerQuestion

SVM Error - The first input should be a struct generated by SVMTRAIN

I am getting error using following code with SVM SVMStruct1 = svmtrain(data,class,'kernel_function','linear'); class12=...

ungefär 12 år ago | 0 answers | 0

### 0

answersSolved

Is my wife right? Now with even more wrong husband

Again, as in "Is my wife right?" ( <http://www.mathworks.com/matlabcentral/cody/problems/149-is-my-wife-right> ), answer 'yes' r...

mer än 12 år ago

What do all these errors mean and is there anything that I can do to prevent/fix this

http://www.mathworks.com/help/matlab/matlab_prog/resolving-out-of-memory-errors.html This might help!

mer än 12 år ago | 0

| accepted

Error using ==> mtimes Inner matrix dimensions must agree.

pts3 = H*[pts1;ones(1,n)]; if you check the size of H and size of [pts1;ones(1,n)], the no. of columns of H and no. o...

mer än 12 år ago | 0

Solved

Distance walked 1D

Suppose you go from position 7 to 10 to 6 to 4. Then you have walked 9 units of distance, since 7 to 10 is 3 units, 10 to 6 is 4...

mer än 12 år ago

Solved

Sorted highest to lowest?

Return 1 if the input is sorted from highest to lowest, 0 if not. Example: 1:7 -> 0 [7 5 2] -> 1

mer än 12 år ago

getting rid of a loop

b=[V(:,4) V(:,5) V(:,10) V(:,18)] b will be what you want.

mer än 12 år ago | 0

Question

ROC curve for Decision Tree

I am getting ROC curve for decision tree but I am a bit taken away by the curve. Its similar to the curve, http://ard.bmj.com...

mer än 12 år ago | 2 answers | 0

### 2

answersEntering a formula by user

Have a look at eval: http://www.mathworks.com/help/techdoc/ref/eval.html aMatrix = magic(5); expression = input('Ent...

mer än 12 år ago | 0

| accepted

Subscript indices must either be real positive integers or logicals; Perimeter issue

plot(x,y((i-1)*5000:i*5000),'g') when i=1, you are indexing y from 0:5000, matlab doesnt have 0 index.

mer än 12 år ago | 1

| accepted

Solved

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...

mer än 12 år ago

Why do I get this response 'Operands to the || and && operators must be convertible to logical scalar values.'?

G=str2num(Grade); G will be a string so you need to convert that to a number using the str2num function. Its better to use...

mer än 12 år ago | 0

| accepted

rows which do not contain zero

count=sum(sum(D==0,2)==0) count will be the number of rows which are not all zeros in matrix D.

mer än 12 år ago | 0

Solved

Create times-tables

At one time or another, we all had to memorize boring times tables. 5 times 5 is 25. 5 times 6 is 30. 12 times 12 is way more th...

mer än 12 år ago

Solved

Weighted average

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

mer än 12 år ago

Initialization of array of structure

You shouldnt do LD=[], instead you should change the field of each of the structure in the array.

mer än 12 år ago | 0

a simple question about for loop

First of all its loop not loob. I hope you meant range as a variable. the following code should work. for a = (1:10) ...

mer än 12 år ago | 0

Solved

Find relatively common elements in matrix rows

You want to find all elements that exist in greater than 50% of the rows in the matrix. For example, given A = 1 2 3 5 ...

mer än 12 år ago

Solved

Find the numeric mean of the prime numbers in a matrix.

There will always be at least one prime in the matrix. Example: Input in = [ 8 3 5 9 ] Output out is 4...

mer än 12 år ago

Solved

Implement a ROT13 cipher

Replace each character in string s1 with the character that is shifted 13 positions from it (wrap back to the beginning if neces...

mer än 12 år ago

Solved

Nearest Numbers

Given a row vector of numbers, find the indices of the two nearest numbers. Examples: [index1 index2] = nearestNumbers([2 5 3...

mer än 12 år ago

Solved

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...

mer än 12 år ago

Submitted

Customized K-Means

Customized K-means where you can choose different initial cluster centroid.

mer än 12 år ago | 1 download |

Solved

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 ...

mer än 12 år ago

Solved

Bottles of beer

Given an input number representing the number of bottles of beer on the wall, output how many are left if you take one down and ...

mer än 12 år ago

Solved

Swap the input arguments

Write a two-input, two-output function that swaps its two input arguments. For example: [q,r] = swap(5,10) returns q = ...

mer än 12 år ago