# Doddy Kastanya

I love math and physics. Being a nuclear engineer keeps this alive.

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**Content Feed**

Filling missing points in a grid

You could try to add the following at the end of your code: hold on text(7,8,'X','color','r') If there are other points, then...

1 year ago | 0

| accepted

Need Help Coding a Gaussian Problem

You might not be using the correct data for this. For example, in your implementation x_i and x_j are simply numbers. Shouldn't ...

1 year ago | 0

How can I find the median of each row in a matrix?

Try this (assuming that your matrix is called A): for i=1:150 x=sort(A(i,:)); median_value(i)=0.5*(x(2)+x(3)); end You will...

1 year ago | 0

solve large sparse jacobian matrix (with an example)

I assume that the Jacobian matrix is needed as a part of implementing Newton's method to solve system of non-linear equations. F...

2 years ago | 0

| accepted

Matlab function solve number pattern

The following code listing should do it (ignore the zeros in the output): cnt=0; for i=1:5 for j=1:i cnt=cnt+1; ...

2 years ago | 0

symbolic system of equations matlab

You might want to check out the information in the following link https://www.mathworks.com/help/symbolic/solve-a-system-of-alge...

2 years ago | 0

Multiplication between matrices with different dimensions

Your loop is in terms of "w"; however, in the loop "w" is not used at all. Shouldn't "i" be "w"? The pseudoinverse matrix can b...

2 years ago | 0

Newton's Optimization Method

The following link provides information about Hessian Matrix for a scalar function: https://www.mathworks.com/help/symbolic/hess...

2 years ago | 0

Plotting a graph on MATLAB

In order to see more "dots", you need to add "hold on" on the line after plot. However, since you want to plot it against the nu...

2 years ago | 0

Add title to subplot (a), (b), (c) with already existing titles for parameters.

You might want to take a look at this posting: https://www.mathworks.com/matlabcentral/fileexchange/85453-subplotlabel/?s_tid=ml...

2 years ago | 0

| accepted

Add title to subplot (a), (b), (c) with already existing titles for parameters.

You probably could add the "(a)" (or b, c, d, e, or f) before specifying the beta_e and t_f in the title section.

2 years ago | 0

for loop issue not all answer printing out

Hi Anastasia, The problem is you did not store the results as a vector; therefore, when you printed out the table, only the las...

2 years ago | 0

| accepted

Inverse matrix with for loop

The way you prepare the cofactor is okay. You want to define your "k=transpose(c)" outside of the loop. The other thing that you...

2 years ago | 0

How do I write an equation when I have both a variable and its value for one side

The problem as you presented is non-linear and would need some manipulations before you can solve it. However, if "y=a+b" instea...

2 years ago | 0

draw this figures using matlab code

The plots seem to be very straight forward to generate. You might want to try "help plot" to see various options to plot the dat...

2 years ago | 0

If i have a given Matrix (k x k), how can i expand it to a (n x n) matrix?

It is not clear how the B and C matrices are related to A. However, if you just want to do QR decomposition, you might want to t...

2 years ago | 0

Plotting Two Sets of Data on 2 X Axes and 1 Y Axis

To avoid overlap of the two x-axis, you might want to use 'top' for 'XAxisLocation' for ax2.

2 years ago | 0

How can I change the colour of specific bars in a bar graph

You can create a handle on the graph and replace the properties accordingly. Here is an example. >> x=[1:10]; >> b=bar(x); >>...

2 years ago | 0

| accepted

function with two inputs.

The code you have now already has the information you needed. However, you have not printed out the results yet. You need to mo...

2 years ago | 0