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# David Hill

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2 457 total contributions since 2017

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Operate on matrices of unequal, yet similar, size
You may want to add a vector to a matrix, implying that the vector is added to each column of the matrix. Or multiply a 3x4x5 ma...

environ 2 heures ago

Solved

Determine the Base of the Equation Provided

environ 12 heures ago

Problem

Determine the Base of the Equation Provided

environ 12 heures ago | 0 | 1 solver

Error: Array indices must be positive integers or logical values.
You are still indexing at zero. If you just want cosd at each theta then: x=cosd(theta);

environ 15 heures ago | 0

Solved

Cipher the number

environ 15 heures ago

Solved

Convert Decimal Number to Hex number (including non integer value)
Convert Decimal Number to Hex number (including non integer value) E.X. (2598.675) in decimal = A26.ACCC in hexa

environ 16 heures ago

color area between functions
x = -1:.01:4; g = exp(-x.^2./2); h = x.^2-3.*x+2; plot(x, g, 'r', 'LineWidth', 2); hold on; plot(x, h, 'b', 'LineWidth', 2)...

1 jour ago | 0

| accepted

Solved

Find out base of following arithmetic operation
Find out base of the following arithmetic operation. So for example 41/3=13 is true in base 8. Another example: 23+44+14...

1 jour ago

Converting Output from a Function
Recommend you look at datetime() function. You can easily add two datetimes together.

1 jour ago | 0

How can i store the values of a polynomial equations in a for loop condition?
You could enter all of your equations at once in the form of a matrix, padding any polynomial equations with zeros if they are o...

1 jour ago | 0

WHY THE CODE GIVE ERROR AT THE d=a*(b+c);
x=0:1:20; a=exp(-1.3*x); b=-1.56*10^-5*sin(13*x); c=3.4*10^-6*cos(13*x); d=a.*(b+c);%need a dot (.*) plot(x,d);

1 jour ago | 0

How can i use polyval on the input polynomial question?
Why not just enter the polynomial coefficents instead of an equation? p=input('Polynomial coefficents, (like [1 2 3 4]):'); va...

1 jour ago | 0

Error printing plot to PDF
x=0:.01:2*pi; y=sin(x); plot(x,y); plot2pdf('sin') Simple function below generates pdf. function plot2pdf(NAME) fig = ...

2 jours ago | 0

call an equation within the function
You can pass the data function to your other function. Not sure this helps. I still don't know exactly what you are trying to do...

3 jours ago | 0

| accepted

Matlab resizing a matrix
Not sure how you want to select the elements between the first and last. newMatrix=reshape([yourMatrix(1:58:end),yourMatrix(end...

4 jours ago | 0

Solve systems of equations graphically
Do you just want to plot them to see where the curves cross? x=-5:5; y=.5*x.^2-2; z=x+2; plot(x,y,x,z); grid on; grid mino...

4 jours ago | 0

| accepted

How to select every second number from a file of numbers separated by a comma

4 jours ago | 0

Solved

Replace all odd numbers with NaN
Replace all odd numbers in the vector or matrix with NaN. For example, if x = [1 3 4 5 8 11]; then return y = [NaN Na...

5 jours ago

Solved

Sideways sum
Given natural number calculate its _population count_.

5 jours ago

Solved

String Array Basics, Part 1: Convert Cell Array to String Array; No Missing Values
<http://www.mathworks.com/help/matlab/characters-and-strings.html String array> and cell array are two types of containers for s...

5 jours ago

Solved

Remove element(s) from cell array
You can easily remove an element (or a column in any dimension) from a normal matrix, but assigning that value (or range) empty....

5 jours ago

Solved

Create a cell array out of a struct
Create a cell array out of a (single) struct with the fieldname in the first column and the value in the second column: in: ...

5 jours ago

Solved

Natural numbers in string form
Create a cell array of strings containing the first n natural numbers. _Slightly_ harder than it seems like it should be. Ex...

5 jours ago

Solved

Fix the last element of a cell array
Note: this is lifted directly from <http://www.mathworks.com/matlabcentral/answers/82825-puzzler-for-a-monday Puzzler for a Mond...

6 jours ago

Solved

Solve system of equation!
Given provided system of equation, and find x and y. System of equation can be expressed as each term's coefficient. For exam...

6 jours ago

Solved

Removing vibration!
There are [y] that vary with [x] but y including small useless vibration. x=1:10 y=[1.71 2.03 3.28 4.05 5.10 6.82 7.69 8.3...

6 jours ago