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I am trying to write a function that will find a sum of all diagonal elements of matrix. I don't know how to do it correctly. This is how I tried do do it. ...
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Below is my written program ...
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I'm trying to fit a model curve to some data by performing a chi square minimisation wrt three parameters $a,b$ and $NN$. The trouble I am having is that the variables with which I want to minimise ...
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Assume we have this For loop: For[i=1,i<10,i++, i^2]. How can we put the squared values ...
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I have got a list of strings, a = {"first","second","third"}. For each of those strings I would like to create a variable called "The" followed by its content, so ...
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Suppose that I have to print the following lines: Number 1 is 5 Number 2 is 6 Number 3 is 7 Number 4 is 8 Number 5 is 9 Now, if I were programming in C, I would have run the following code : ...
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Here my code is running fine.In this code I put x=1 but I want to run x from 1 to 100 and for each value of x I want to export the excel file by the name according to x value.like for x=1 it export by ...
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I have implemented the whole Baum-Welch Algorithm for training Hidden Markov Models as described in Rabiner's paper Here is my code that calculates the Forward Probabilities` ...
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I am trying to solve multiple instances of the same problem using FindInstance. ...
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I do not want to change all of them just some of them in particular rule. For example the list is given a={1,2,3,4,5,6,7,8,9....,100} If the number is bigger than ...
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### Finding C[i]'s expression in DSolve solution

An example, the command DSolve[y''[x] - 4 y[x] == 1, y[x], x] gives solution ...
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I have a task, where I have to combine pairs with a function, but the number of pairs I actually need is much smaller than the number of all pairs. The condition to keep the element is some function ...