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# Mayssa

Active since 2014

Professional Interests: image processing, mathematics

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Question

How can I remove the borders from the bar plots ?
I have a figure of bar plots using bar function and I want to remove the borders, couldn't find something useful in the properti...

ungefär 4 år ago | 1 answer | 0

### 1

Question

Why do SVM predict always the same value ?
I am training an SVM on a medical data but I always get the same predicted label no matter the partition of sample is. Is there ...

mer än 4 år ago | 0 answers | 0

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Question

How does a mex function work ?
I am not that familiar with mex functions (nor C coding) and I need to understand a code in which the author is using one. It is...

mer än 4 år ago | 2 answers | 0

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Question

Cvpartition "holdout"; "leaveout", "Kfold" ?
Can you please give me examples of codes where these three types of partitions are used ( I have read the description but I real...

nästan 5 år ago | 0 answers | 0

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Question

Can we convert a vector into a similarity matrix ?
I have a vector of size 1x40000 and I want to know if it is possible to compute "its" similarity matrix with Matlab

nästan 5 år ago | 0 answers | 0

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Question

Why cov doesn't return a semi definite positive matrix ?
I have a matrix of features and based on that, I need to compute a semi definite positive matrix (covariance matrix) for testing...

ungefär 5 år ago | 1 answer | 0

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Question

If we have this expression tra{m}.X, what sould "tra" be ?
I am trying to understand a function that trains a simple multiple Kernel SVM on training data with given parameters (smksvm(tra...

ungefär 5 år ago | 0 answers | 0

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Solved

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...

ungefär 5 år ago

Question

How can I use C++ to speed up my matlab code ?
Hi every one, I am working on image processing and I generated a matlab code with many for loops, it takes too long to display ...

ungefär 5 år ago | 4 answers | 1

### 4

Question

why does whiteness show up ? !
I saved an image in my file using "saveas" and I have used those instructions DirectoryPath =('C:\Users\Mayssa\Desktop\p...

mer än 6 år ago | 3 answers | 0

### 3

Question

Error while creating a standalone executable application ?
While creating an executable application (made by uicontrol), I always have this error "error during packaging", When I open the...

ungefär 7 år ago | 1 answer | 0

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Solved

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

ungefär 7 år ago

Question

How can I get the different values from a slider?
I am working on uiconrol and I need to get the values from the slider so I can use it in onother script as a threshold to conver...

ungefär 7 år ago | 1 answer | 0

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Solved

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

ungefär 7 år ago

Solved

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

ungefär 7 år ago

Solved

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 ...

mer än 7 år ago

Solved

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:...

mer än 7 år ago

Solved

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...

mer än 7 år ago

Question

Is there a command on matlab that detects only the outer edge of an image ?
I am working on the detection of breast cancer, and I need a command Matlab that detects only the outer edge of the breast

nästan 8 år ago | 1 answer | 0