Answered

Script doesn't seem to be execute properly

In your code, you spend a lot of time computing the same prime over and over again. Do not start the search at a+1 for the secon...

Script doesn't seem to be execute properly

In your code, you spend a lot of time computing the same prime over and over again. Do not start the search at a+1 for the secon...

6 months ago | 3

Answered

Question on running fitlda

Gibbs sampling involves stochastic elements (i.e., a pseudorandom number generator), meaning reproducing exactly the results of ...

Question on running fitlda

Gibbs sampling involves stochastic elements (i.e., a pseudorandom number generator), meaning reproducing exactly the results of ...

6 months ago | 1

| accepted

Answered

Changing varibles in a Matrix to Values

Assigning values to MATLAB variables does not affect symbolic expressions that have variables of the same name inside. Use the s...

Changing varibles in a Matrix to Values

Assigning values to MATLAB variables does not affect symbolic expressions that have variables of the same name inside. Use the s...

7 months ago | 0

Answered

multivariable dsolve. Can it be solved for multivariables?

You are trying to solve a PDE (partial differential equation), but dsolve only handles ODEs (ordinary differential equations), w...

multivariable dsolve. Can it be solved for multivariables?

You are trying to solve a PDE (partial differential equation), but dsolve only handles ODEs (ordinary differential equations), w...

7 months ago | 1

Answered

How to find mutual words in title field?

If I read the question correctly, you are looking for a co-occurence matrix. You can get those from a bag-of-Words model by a ma...

How to find mutual words in title field?

If I read the question correctly, you are looking for a co-occurence matrix. You can get those from a bag-of-Words model by a ma...

7 months ago | 0

Answered

computing frequency*rank

Assuming we have t = topkwords(bag,100); You can get frequency*rank as: t.FreqTimesRank = (1:size(t,1)).*t.Count; And you ca...

computing frequency*rank

Assuming we have t = topkwords(bag,100); You can get frequency*rank as: t.FreqTimesRank = (1:size(t,1)).*t.Count; And you ca...

7 months ago | 0

| accepted

Answered

Does the text analytics toolbox allow users to test out-of-sample perplexity with LDA?

The second output of logp gives you the perplexity. txt = extractFileText('sonnets.txt'); sonnets = split(txt,[newline newline...

Does the text analytics toolbox allow users to test out-of-sample perplexity with LDA?

The second output of logp gives you the perplexity. txt = extractFileText('sonnets.txt'); sonnets = split(txt,[newline newline...

7 months ago | 0

| accepted

Answered

Code for text mining through Bayes Classifier?

MathWorks has examples like this one using classifiers from the Statistics and Machine Learning Toolbox to work on text data. Th...

Code for text mining through Bayes Classifier?

MathWorks has examples like this one using classifiers from the Statistics and Machine Learning Toolbox to work on text data. Th...

7 months ago | 0

Answered

how to create a function that counts all words in a document?

Check out the bagOfWords class in Text Analytics Toolbox. It solves exactly this problem. (You may want to have some preprocess...

how to create a function that counts all words in a document?

Check out the bagOfWords class in Text Analytics Toolbox. It solves exactly this problem. (You may want to have some preprocess...

7 months ago | 0

Answered

how to find most common words in text by matlab

Finding the most common words is easy with Text Analytics Toolbox: >> sonnets = extractFileText("sonnets.txt"); >> sonnets = e...

how to find most common words in text by matlab

Finding the most common words is easy with Text Analytics Toolbox: >> sonnets = extractFileText("sonnets.txt"); >> sonnets = e...

7 months ago | 1

| accepted

Answered

How to fucntions like plot f(x,y) = 2 when 0<=x<=1 and 0<=y<=x

If the region to plot over were a simple 0 ≤ x ≤ 1 and 0 ≤ y ≤ 1, you could use |fimplicit(f(x,y) - 2, [0 1 0 1])|. I don't thin...

How to fucntions like plot f(x,y) = 2 when 0<=x<=1 and 0<=y<=x

If the region to plot over were a simple 0 ≤ x ≤ 1 and 0 ≤ y ≤ 1, you could use |fimplicit(f(x,y) - 2, [0 1 0 1])|. I don't thin...

1 year ago | 0

| accepted

Answered

Int vs Integral; Int giving wrong results

As the documentation says down in the “Tips” section, |int(f,1,S)| assumes that |1 ≤ S|. In that region, your input function is ...

Int vs Integral; Int giving wrong results

As the documentation says down in the “Tips” section, |int(f,1,S)| assumes that |1 ≤ S|. In that region, your input function is ...

1 year ago | 1

Answered

measuring term frequency of words

See <https://www.mathworks.com/help/textanalytics/ref/bagofwords.html the |bagOfWords| documentation>. E.g., you can use the |tf...

measuring term frequency of words

See <https://www.mathworks.com/help/textanalytics/ref/bagofwords.html the |bagOfWords| documentation>. E.g., you can use the |tf...

1 year ago | 0

| accepted

Solved

5th Time's a Charm

Write a function that will return the input value. However, your function must fail the first four times, only functioning prope...

1 year ago

Solved

Sums of Distinct Powers

You will be given three numbers: base, nstart, and nend. Write a MATLAB script that will compute the sum of a sequence of both ...

1 year ago

Solved

"Cody" * 5 == "CodyCodyCodyCodyCody"

*Alice*: What? *"Cody" * 5 == "CodyCodyCodyCodyCody"*? You've gotta be kidding me! *Bob*: No, I am serious! Python supports...

1 year ago

Solved

Acid and water

⚖ ⚖ ⚖ ⚖ ⚖ ⚖ ⚖ ⚖ Assume that there is a 100 liter tank. It is initially fi...

1 year ago

Solved

Number of Even Elements in Fibonacci Sequence

Find how many even Fibonacci numbers are available in the first d numbers. Consider the following first 14 numbers 1 1 2...

1 year ago

Solved

The 5th Root

Write a function to find the 5th root of a number. It sounds easy, but the typical functions are not allowed (see the test su...

1 year ago

Answered

Is it possible to convert symfun to sym?

Symfun is a subclass of sym, so, yes, a symfun is already a sym. To get only the body of the function, use |formula| or call ...

Is it possible to convert symfun to sym?

Symfun is a subclass of sym, so, yes, a symfun is already a sym. To get only the body of the function, use |formula| or call ...

1 year ago | 1

Answered

How to Read PDF file in Matlab?

Just for the record, Text Analytics Toolbox (new in R2017b) includes a function |extractFileText| that will extract text data fr...

How to Read PDF file in Matlab?

Just for the record, Text Analytics Toolbox (new in R2017b) includes a function |extractFileText| that will extract text data fr...

1 year ago | 0

Answered

Is there any video which shows the entire process of opinion mining on actual data?

In its simplest form, opinion mining can be viewed as a binary classification problem. There is an example at <https://www.mathw...

Is there any video which shows the entire process of opinion mining on actual data?

In its simplest form, opinion mining can be viewed as a binary classification problem. There is an example at <https://www.mathw...

1 year ago | 0

| accepted

Answered

How can I remove websites' links from a text?

The <https://www.mathworks.com/help/textanalytics/ref/eraseurls.html eraseURLs> functions might help. Which does a little more w...

How can I remove websites' links from a text?

The <https://www.mathworks.com/help/textanalytics/ref/eraseurls.html eraseURLs> functions might help. Which does a little more w...

1 year ago | 0

Answered

Text Extraction and retrieval

It's probably easiest to split the text and then check the number of splits created to count, using string functions: str =...

Text Extraction and retrieval

It's probably easiest to split the text and then check the number of splits created to count, using string functions: str =...

1 year ago | 0

Answered

Basic question about Text Analysis/Text Analytics/Text Mining using Matlab

As a quick update, the new <https://www.mathworks.com/products/text-analytics.html Text Analytics Toolbox> debuted in R2017b.

Basic question about Text Analysis/Text Analytics/Text Mining using Matlab

As a quick update, the new <https://www.mathworks.com/products/text-analytics.html Text Analytics Toolbox> debuted in R2017b.

1 year ago | 0

Answered

How to link 2 3D subplots to sync zoom and pan?

As Adam suggested in the comments, this seems to work: ax1 = subplot(1, 2, 1); [x,y,z] = peaks; surf(x,y,z); ax2 =...

How to link 2 3D subplots to sync zoom and pan?

As Adam suggested in the comments, this seems to work: ax1 = subplot(1, 2, 1); [x,y,z] = peaks; surf(x,y,z); ax2 =...

2 years ago | 4

| accepted

Solved

Triangle sequence

A sequence of triangles is constructed in the following way: 1) the first triangle is Pythagoras' 3-4-5 triangle 2) the s...

2 years ago

Solved

Find a Pythagorean triple

Given four different positive numbers, a, b, c and d, provided in increasing order: a < b < c < d, find if any three of them com...

2 years ago

Solved

Find out sum of all elements of given Matrix

Find out sum of all elements of given Matrix A=[1 2 3;4 5 6 ;7 8 9]; Answer must be: 45 *If you like this problem, pl...

2 years ago

Solved

Area of an equilateral triangle

Calculate the area of an equilateral triangle of side x. <<http://upload.wikimedia.org/wikipedia/commons/e/e0/Equilateral-tr...

2 years ago