# Chris

**Statistics**

**MATLAB Answers**

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**Content Feed**

Question

How can I change all numbers in matrix to 1? except for 0

How can I change all numbers in matrix to 1? except for 0 I want to make the matrix which has 1(all the numbers) or 0.

2 months ago | 3 answers | 0

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answersQuestion

I used "[b,dev.stats]=glmfit(b1,a1,'binomial')" function, and it has an error..

I used "[b,dev.stats]=glmfit(b1,a1,'binomial')" function, and it has an error.. a1 and b1 are 131472*1 matrix. When I used "gl...

2 months ago | 1 answer | 0

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answerQuestion

When I used "gamfit(data)", it says "X must be non-negative."

I have 45000*1 data table and all of values are non negative. When I used "gamfit(data)", it says "X must be non-negative." Wou...

2 months ago | 1 answer | 0

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answerQuestion

I used "autocorr"function and got this graph. How can I interpret this grpah meaning?

2 months ago | 1 answer | 0

### 1

answerQuestion

How can I plot Kendall tau trend by using MATLAB code?

I have 1*20 matrix and want to plot Kendall tau trend. May I ask how to do it by using codes?

3 months ago | 1 answer | 0

### 1

answerQuestion

May I ask how I can find 95% confidence interval of skew_FP() from these codes?

rng(1000) nn=143; for n=1:1000; r=rand(nn,1); ss(n)=std(r); m(n)=mean(r); med(n)=median(r); nu(n)=numel(r) skew_FP(n) = ...

3 months ago | 1 answer | 0

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answerQuestion

I want to test whether the skewness of the samples(from A:900*1 matrix) converge to 0 or not by using Montecarlo simulation.

Hi, I want to test whether the skewness of the samples(from A:900*1 matrix) converge to 0 or not by using Montecarlo simulation...

3 months ago | 0 answers | 0

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answersQuestion

I want to determine if the data(tmin) are Gaussian distributed or not by using Montecarlo simulation with skewness.

nn=143; for n=1:1000; load('ERA_Livneh_Birmingham.mat') ss(n)=std(tmin); m(n)=mean(tmin); med(n)=median(tmin); nu(n)=numel...

3 months ago | 0 answers | 0

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answersQuestion

I want to do bootstrap analysis by using 20*1 matrix.

I want to draw 500 samples from the 20*1 matrix (20 pairs of observations). In this case, what codes do I have to use?

3 months ago | 2 answers | 0

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answersQuestion

Can I use "chi2gof" code in this case?

The forecasts of event A: 500 and the observations of event A: 400. I want to use chi-square test. In this case, can I use "chi...

3 months ago | 1 answer | 0

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answerQuestion

May I ask how I can get the 95% confidence intervals for the true mean data?

"A" is data with 700*1 matrix. I want to have the 95% confidence intervals for the true mean of A. What codes do I have to use...

3 months ago | 0 answers | 0

### 0

answersQuestion

What codes do I have to use to determine if the data are Gaussian distributed?

What codes do I have to use to determine if the data are Gaussian distributed?

3 months ago | 1 answer | 0

### 1

answerQuestion

May I ask how to plot Poisson distribution plot?

lamda = 47/42; year_span = 1, 2, ....., 9; x = 0; p = (exp(-lamda*year_span))*((lamda*year_span)^x)/(factorial(x)); 1-p T...

3 months ago | 1 answer | 0

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answerQuestion

Would you please tell me what do I have to fix in Binomial distribution code?

for n = 2:30 for x=1:n; p(x) = (factorial(n)/(factorial(x)* factorial(n-x)))*((10/230)^x)*(1-(10/230).^(n-x)); ...

4 months ago | 1 answer | 0

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answerQuestion

Question about "gamcdf" code

The scale parameter is 2 and shape parameter is 1. I want to use "gamcdf" code for 75th percentile value, then do I have to use ...

4 months ago | 1 answer | 0

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answerQuestion

May I ask what MATLAB code for expected value is by fitting a Poisson distribution?

A = [1, 2, 3, 4, ..., 100] In this case, I want to fit a Possion distribution and get the expected value. Would you please tel...

4 months ago | 1 answer | 0

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answerQuestion

I have troubles in for loop with 2 variables.

for n = 2:30 for x=1:n; p(x) = (factorial(n)./(factorial(x).* factorial(n-x))).*((10/230).^x).*(1-(10/230).^(n-x))...

4 months ago | 1 answer | 0

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answerQuestion

What is the code of Gamma distribution with method of moments?

What is the code of Gamma distribution with method of moments?

4 months ago | 1 answer | 0

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answerQuestion

How can I make a Monte Carlo estimate for skewness (by using a sample size of n=500 with 500 repetitions?)

May I ask how can I make a Monte Carlo estimate for skewness (by using a sample size of n=500 with 500 repetitions?) Also, how ...

4 months ago | 1 answer | 0

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answerQuestion

Would you tell me the code for Fisher Pearson skewness?

Would you tell me the code for Fisher Pearson skewness? How can I get the skewness with Fisher Pearson formula..?

4 months ago | 2 answers | 0

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answersQuestion

How can I plot "Monte Carlo" with 3000 random numbers?

How can I plot "Monte Carlo" with 3000 random numbers?

4 months ago | 0 answers | 0

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answersQuestion

what formula do I have to put for calculating by using MATLAB?

N = 500, S = 110. Then what formula do I have to put for calculating by using MATLAB?

4 months ago | 1 answer | 0

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answerQuestion

How can I compare with daily precipitation data from the day before?

I have 30 years of daily precipitation data. I want to compare those data with the data from the day before. A is 10950*1 matr...

5 months ago | 1 answer | 0

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answerQuestion

How can I find numbers>30 in 810*1 matrix?

How can I find numbers>30 in 810*1 matrix?

5 months ago | 1 answer | 0

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answerQuestion

How can I extract specific data?

There are 7300*1 matrix of daily temperatures. Would you please tell me how can I get summer temperatures (June to August)?

5 months ago | 1 answer | 0

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answerQuestion

How can I select or extract rows?

I have a 9855 * 1 table indicating months. Such as 1 1 1 2 2 2 3 3 3 . . 12 12 12 1 1 1 2 2 2 ... How ...

5 months ago | 1 answer | 0

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answerQuestion

How to extract the specific rows from the table?

There are total of 30 years precipitation data (Januaray to December). There are only one column with January to December. How...

5 months ago | 0 answers | 0

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answersQuestion

How can I get precipitation data only for summer (June~August for 30 years)?

I have a daily precipitation data for 30 years. Then how can I get precipitation only for summer (June~August for 30 years)?

5 months ago | 1 answer | 0

### 1

answerQuestion

How can I convert x-axis (cycle or day) to x-axis (frequency) ?

How can I convert x-axis (cycle or day) to x-axis (frequency) ? If it is possible, could you tell me the method??

1 year ago | 1 answer | 0

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answerQuestion

I want to draw dotted line arrow by using quiver. What do I have to do?

I want to draw dotted line arrow by using quiver. What do I have to do?

1 year ago | 1 answer | 0