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# jenka

156 total contributions since 2007

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Question

predictive ability of matlab
I have original time series that experienced as some point in time abnormal values. I would like then to compare it to 12 other ...

1 month ago | 1 Answers | 0

### 1

Posted

Drawing probabilities
Hi all, I have a quick question. I have the set of proportions for 4 variables: Var_1: 70-80% Var_2: 20-30% Var_3: 3-4% I need t...

10 months ago | 542 views

Question

possible bug in "unique" function
Dear all, Could you, guys, help me please. I have a matrix X = 2.2000 3.3000 2.2000 3.3000 4.0000...

1 year ago | 4 Answers | 0

### 4

how to create two bell shape curves
Hi Wayne, yes, I tried both ways already. However, if you do sum(y) or sum(y1) to give you the are under the curve (or trapz(y)...

3 years ago | 0

Question

how to create two bell shape curves
with the areas under these curves equal to 1, the same mean but different standard deviations. Thanks!

3 years ago | 3 Answers | 0

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Question

gaussian histogram so that area is equal to one.
I have a quick question. I am creating my data in the following manner: a = -100; b = 100; x = a + (b-a) * rand(1, 500);...

3 years ago | 1 Answers | 0

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Question

is the a way to vary intersection between two normal bell curves
I would like to generate two random gaussian curves in such a way that I have a way to control intersection between these two cu...

3 years ago | 0 Answers | 0

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Question

difference between trapz and just summing
Dear everybody, I was wondering what is the difference between the function trapz and the sum as used below. It appears to be a...

3 years ago | 1 Answers | 0

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Responded

Re: tail extropolation
that is I want to look at cdf values byeond the smallest and largest values as provided by data

3 years ago | 1212 views

Posted

tail extropolation
I have histogram and I would like to extropolate both of its tails. Could you please suggest how could I do that within the matl...

3 years ago | 1212 views

not sure how to approach this
This is sooo great! I am so thankful to you!

4 years ago | 0

Question

not sure how to approach this
I have a 2D matrix. Let's say A=80x100; I need a way to visit each cell in this matix only once. Moreover my problem is a littl...

4 years ago | 3 Answers | 0

### 3

Question

Cell array....searching without a loop?
I have a cell array A. Size is 200x1. The size of A{1} is 501x201x119=i x j x k. The same is true for other cells in A. Now for ...

4 years ago | 1 Answers | 0

### 1

Question

plotting histogram at each pixel of imagesc, possible?
Hi everybody, I have a quick question. I have two variables a=11x119x50 and b=119x50. I am plotting b as imagsc(b). Now I wou...

4 years ago | 1 Answers | 0

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Question

is there to make this double room to run faster?
Hi guys, I am trying to reduce the cost of running my program: is there a way to reduce two pieces of code: FIRST ONE: ...

4 years ago | 1 Answers | 0

### 1

Question

quick syntax question for saving run time
I have the following: m1 = rand(5,5) m2 = rand(5,5) m3 = rand(5,5) m4 = rand(5,5) ...

4 years ago | 1 Answers | 0

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finding a minimum from multiple matricies
You, guys, are soooooooooooooo great! Awesome! and thank you!

4 years ago | 0

Question

finding a minimum from multiple matricies
Hi everybody, I have a few large matricies of equal size. At each location, I would like to find minimum and its index. Note, es...

4 years ago | 5 Answers | 1

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Question

comparing shapes: how to find the right one
Hi everybody, I have the following problem. I have a true data set. Which is a binary matrix (0/1). If I do imagesc(true_data), ...

4 years ago | 1 Answers | 0

### 1

Question

shape matching: how to best address this problem
Hi everybody, I have this problem. In the figure, I need to see which set 1 or set 2 best matches my main set. Of course, you ca...

4 years ago | 0 Answers | 0

### 0

Question

automatic kmeans: choosing the number of clusters automatically?
Hi, I was wondering if there is a way in matlab to do automatic kmeans clustering where the number of clusters K is choosen auto...

4 years ago | 1 Answers | 0

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the problem of shifting and pcolor
This is exactly the issue with pcolor I am facing. I am just not sure how to solve this small problem: p_color with shading fla...

4 years ago | 0

Question

the problem of shifting and pcolor
Hi all, I am doing this code, and it appears that my text pixels are shifted compared to my pcolor output. Any suggestions. Not...

4 years ago | 2 Answers | 0

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Question

pcolor and pixel shift
I am using the following code. It appears that my text '*' has been shifted somewhat. Any suggestions on how to shift it back. I...

4 years ago | 1 Answers | 0

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m_proj question: unexpected error
Hi, well actually that is what is giving to me. I cannot change it. I did [x,y]=m_ll2xy(lon,lat,'clip','off')

4 years ago | 0

Question

m_proj question: unexpected error
I have vector of lat and lon defined as: lat = linspace(90,32,30); lon = linspace(0,358,180); I then do m_proj: ...

4 years ago | 3 Answers | 0

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Question

any fast funcitons to do this triple for loop?
I have this code. Is there any way to make it faster. My data is huge. Thanks. I am simple restoring everthing into vector inste...

4 years ago | 1 Answers | 1

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Question

function that can do random drawing
I have the following probabilities: 0.8 for category 1 and 0.2 for category 0. I need to randomly draw a category (0/1) such tha...

5 years ago | 1 Answers | 0

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Question

regress and stats
In regress function there is an option to save stats that includes R^2 among the other things. I am trying to see the relationsh...

5 years ago | 2 Answers | 0

### 2

Question

how to find which bin the number goes to in histogram
Dear everybody, So, I have the following [h, value] = hist(X, 25); I then have a number coming in say Y=5. I would like to ...

5 years ago | 1 Answers | 1