the cyclist
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Obsessive runner. Flâneur. Professional Interests: Predictive modeling, statistics. (I don't respond to email via author page, but will usually look at a question if you send me a link to it.)
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Content Feed
Show free variables in solution(s) instead of zeros
A numeric matrix in MATLAB cannot hold an "x". You could change them to NaN: % Your solution M = [0, 0, 90.0, 0, 0, 0; ...
alrededor de 3 horas ago | 0
Predictions Logistic Regression model using fitglm
I have a couple of comments, before answering your specific questions. First, you might benefit by reading up a little bit on g...
alrededor de 7 horas ago | 0
Turning a char element in a double array
a = char('[21,12,43,1]'); array_convert = str2num(a)
alrededor de 9 horas ago | 0
How to replace only one instance in a certain string
If you are certain that the first e is the first character of the string, then this will do it: x = 'e-8.5e-5' y = regexprep(x...
alrededor de 9 horas ago | 0
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read data of 3 dimensional matrix
% Some pretend data data = rand(129, 135, 365); % Max along 3rd dimension max3 = max(data,[],3); % Display size of max3 ...
alrededor de 13 horas ago | 0
Is there any more efficient way to split a table than this
% Set random seed for reproducibility rng default % Make up a table with pretend data N = 30; x = rand(N,1); solar = 200*...
alrededor de 14 horas ago | 0
Plotting y1 and y2 versus time in the same graph with same axis level but both in the same side and different y axis name.
Not sure what you mean about "mentioning both speeds in y axis". A more conventional method would be to use a legned. Does this ...
1 día ago | 0
How to create animation of multiple of frames using for loop ?
I believe you can do what you want by using the getframe and movie functions.
1 día ago | 0
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Remake this without a loop
% Pretend data A = 1 : 7; vector = [2 3 5]; % Replace values of A with 0, if they are in vector A(ismember(A,vector)) = 0
1 día ago | 1
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I have been working on this code. But it's kept showing me this error. Please help me
How are you trying to run that code? If you just try to run those lines from the Command Window, it will give that error. The r...
1 día ago | 0
Get next business day without taking into account holidays and saturdays
The issue is not a problem with busdate(), but with your understanding of the input. 20170610 is being interpreted as a serial d...
1 día ago | 1
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Using a GLM model to predict the response factor from a fixed factor
I'm very confused about how you have coded the model. Specifically, The first input to fitglm should be the predictor variable,...
4 días ago | 0
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Turning an entire script into a function
Put this code into a file named battleship.m function [] = battleship() clear all close all clc rowdim=input('give me...
4 días ago | 0
kstest for uniform distribution
From the documentation: "The one-sample Kolmogorov-Smirnov test is only valid for continuous cumulative distribution functions."...
6 días ago | 0
Using Linear Mixed Models with two fixed factors and a random factor
You can fit such a model using the fitlme function from the Statistics and Machine Learning Toolbox. I think the following code...
7 días ago | 1
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How to find area under curve
I did not open your text file, but assuming you got that plot using plot(x,y) then it should be as easy as trapz(x,y)
10 días ago | 0
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How to bin IDX based on previous IDX value?
Is this what you mean? a = [0 0 1 2 2 1 2 2 1 0 1 0 2]; loc2 = a(2:end)==2; pre = a(1:end-1); b = 1 + find(loc2 & (pre=...
11 días ago | 0
how do we make vector the same length ( i get the error: vector must be the same length)
I think you intended elementwise division. See the documentation for array vs. matrix operations. x=linspace(0,100); y=linspac...
12 días ago | 0
I have this code in matlab but it does not work alone. I think I need a script for it.
Works for me. Here is an example f = @(x) x.^2 - 1; df = @(x) 2*x; Newton_method(f,df,3,1.e-6,500) function x = Newton_...
13 días ago | 0
How to plot the figure in the while loop ?
Try putting the figure command and the hold on commands before the while loop (and put the figure command before the hold on). ...
14 días ago | 0
How to create a matrix using two arrays (x & y) and a formula that uses x & y
Use the meshgrid function to create 2-dimensional grids from the x and y vectors. The first example in the documentation is very...
15 días ago | 1
How do I show this matrix in Matlab?
N = 5; % Change this to 50000 for your case a = 3; % The diagonal value b = -1; % The off-diagonal value % Create the matr...
15 días ago | 0
Trying to multiply these matrices and getting error "Dimensions of arrays being concatenated are not consistent."
vqs_ is a 1x501 vector. You can't concatenate the scalar vds to it vertically, which is what you are trying to do.
15 días ago | 1
Generate random errors for data with specific covariance matrices
If you have the Statistics and Machine Learning Toolbox, you can generate correlated normal variables with the mvnrnd function.
15 días ago | 0
how to give title of the legends?
You can use the legend function.
16 días ago | 0
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How to create matrix with Standard deviation from every 5 columns of another matrix?
Here is one way: % Pretend data [Use your actual data instead] M = randn(100,20); % Reshape into the slices needed for stan...
18 días ago | 0
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Using Histogram to create a figure with multiple data sets
One possibility would be to use histcounts to get the bin counts (instead of histogram to plot the bins directly), and then a st...
18 días ago | 0
How to update array inside a database
I don't fully know the answer, but here are a couple thoughts. I highly doubt you need to explore JDBC. If ODBC works for fetch...
19 días ago | 0
Cost matrix from an array without for loop.
You can use implicit expansion to subtract the two vector from each other, by transposing one of them. cost = abs(domain-domain...
20 días ago | 1
| accepted
Is there a way to avoid this inaccuracy when converting an string to a double and then to an unsigned int? I have tried using str2num() but get the same result.Thanks!
The reason for this is that MATLAB uses double-precision arithmetic by default, which will typically give approximately 15 decim...
20 días ago | 0
