Dmitry

Last seen: 5 months 前 | 自 2022 起处于活动状态

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统计学

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The problem with calculating multidimensional integrals
The problem with calculating multidimensional integrals. I'm trying to calculate my integrals and plot a graph, but it gives me...

9 months 前 | 1 个回答 | 0

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The code speed is too slow
I need plot(z, W_res) but my code is incredibly slow and I can't do it. How can I make the code faster so that it can calculate...

9 months 前 | 0 个回答 | 0

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how can I calculate my expression with double integration?
how can I calculate my expression with double integration? at startup, I get an error: Operator '.*' is not supported for oper...

9 months 前 | 2 个回答 | 0

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Integrating a complex function
I want to count such an expression: This function depends on "D", and "k" is why I'm doing the integration. The sum is here b...

1 year 前 | 1 个回答 | 0

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The program is too slow
I have data that I process with my code, but this data is too big and my program does not work, but for a smaller amount of data...

1 year 前 | 0 个回答 | 0

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working with an array
I have a program that cuts out points from a two-dimensional vector that are at a distance 'd' from each other. The program star...

1 year 前 | 0 个回答 | 0

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Optimization problem for curve fitting
I have two vectors that represent the coordinates of the graph by x 'dv' and y 'tv' (the same gn_nach) - this is a graph of a ...

1 year 前 | 0 个回答 | 0

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Unable to perform assignment because the indices on the left side are not compatible with the size of the right side.
My code doesn't work, it gives me an error: "Unable to perform assignment because the indices on the left side are not compatib...

1 year 前 | 1 个回答 | 0

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The problem of plotting
I make a curve fitting selection for a set of points and build a graph that includes: a set of points for which the fitting is p...

1 year 前 | 2 个回答 | 0

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I need code for processing of table data
I will try to explain with an example: we start from B2, if mod(B2 - B3) < 0.404 we delete A3B3 and continue to compare B2 with...

2 years 前 | 0

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I need code for processing of table data
I have a table of values I need in it only those rows of values for which the values of the number in the second column are at a...

2 years 前 | 3 个回答 | 0

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selection of graph points
I have a code that builds level lines for my function of two variables, I need to leave out of these points only those for which...

2 years 前 | 0 个回答 | 0

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How to plot a graph correctly?
I have a function of two variables F(t,d) and am building a plane, and I want to plot a function where F(t,d) - C_2=0, I use fun...

2 years 前 | 2 个回答 | 0

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Solution of the equation
We have such a function: We set the array d = [10:10:10000], d(i) is substituted in and equated to the constant C_2, i.e. we ...

2 years 前 | 0 个回答 | 0

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Solution of the equation
We have such a function: We set the array d = [10:10:10000], d(i) is substituted in and equated to the constant C_2, i.e. we ...

2 years 前 | 1 个回答 | 0

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Plotting the function by the points that need to be determined
It is necessary to plot F(t) by points. The function F(t) is a sum from 0 to nD(t)(nD is the upper limit of the sum) which depen...

2 years 前 | 2 个回答 | 0

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It is necessary to sum the functional sequence F(t) by 'n', while at each step of summation it is necessary to take 'n' from another array n(t).
It is necessary to sum the functional sequence F(t) by 'n', while at each step of summation it is necessary to take 'n' from ano...

2 years 前 | 1 个回答 | 0

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During calculations , a constant is obtained instead of a function
I have a complex function that depends on 'd' and 'n' F(n,d) I need to sum a series over 'n' and plot F(d). I know that after ...

2 years 前 | 0 个回答 | 0

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How to sum up the functional sequence correctly?
I have a complex function that depends on 't' and 'n' F(n,t) I need to sum a series over 'n' and plot F(t). Ef = 2.77*10^3; Kb...

2 years 前 | 1 个回答 | 0

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