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sparse half-precision matrices
The sparse format in MATLAB only supports double and logical data types. To use any other data type you would have to write all...

6 years ago | 0

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Answered
RK4/AB4, need help with correct code for 2 second order equations in Matlab
So, first define a 4-element state vector. To keep the nomenclature the same as the MATLAB docs, I will use the variable name y....

6 years ago | 1

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Answered
Cell Arrays and Indexing?
This is the reverse of your last assignment. It needs only one loop over the number of rows, and the cell array element for tha...

6 years ago | 0

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Cell arrays and Indexing with Cells HELP?
This row = Q(1:end); col = Q{1:end}; Z(row, col) = true; is actually a good attempt and shows you understand the problem .....

6 years ago | 0

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repeat the iteration with an error using try/catch
Maybe this construct does what you want while( true ) try MyProgramHere ...

6 years ago | 0

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Answered
Storing doubles in the smallest integer class for which they fit without changing their value?
Some hints: Don't use loops, use vectorized code to figure out which integer size works. intmax(type) gives you the largest va...

6 years ago | 0

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Answered
How do I make a function work with vectors?
Use element-wise divide operator ./ (with the dot) instead of the matrix divide operator / (without the dot). E.g., tanH(x)=((...

6 years ago | 0

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Answered
ODE solving using RK4 method (Predator prey)
Your basic problem is that you have two states, x and y, but your function arguments are inconsistent with this. Take this code:...

6 years ago | 1

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Answered
Really! fprintf cell error
What happens if you change this fprintf(fid, '%d %s %s %f',shape{i,:}); to this fprintf(fid, '%d %s %s %f',shape{i,1},shape{i...

6 years ago | 0

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Answered
MATLAB Homework Problem: "Incorrect use of '=' operator" in a for loop
This: for (i = 2:0.5:15 && j = -2:0.5:12) Needs to be two nested loops: for i = 2:0.5:15 for j = -2:0.5:12

6 years ago | 1

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Homework help.(User defined functions )
Hint: See these functions: doc size doc isequal doc error

6 years ago | 0

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trouble understanding for loops
The first problem is getting the input from the user. This assigns a char string to pv: pv=('What was your original mortgage v...

6 years ago | 0

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OR statement in a while Loop
Change to AND: while ((playerhp > 0) && (enemyhp > 0)) I.e., you only do the while loop when both hp are positive. It eit...

6 years ago | 0

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Answered
Fastest way to find the row number containing the most amount of black pixels in a gray-scale image?
[~,row_blackPix] = max(sum(image <= 20,2))

6 years ago | 1

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Varying step size for RK Method?
The only variable that depends on a new n is h, so only recalculate h and then run your loop as is. Although if you want to make...

6 years ago | 0

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conversion from base 13 to IEEE 754
For the base 13 conversions: doc dec2base doc base2dec https://www.mathworks.com/help/matlab/ref/dec2base.html https://www.m...

6 years ago | 0

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Whats wrong with my code? Taylor series Approx with error
You probably just need an absolute value error = abs((true-s)/true)*100; %Percent Error Formula That being said, true and erro...

6 years ago | 0

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Functions and For Loops For Polynomials
Some guidance: 1) The sum=0 part needs to be moved outside the loop, prior to the loop starting. The way you have it the sum re...

6 years ago | 1

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How can I randomly select a subset of logicals?
T = your logical trials vector n = 20; % number of trials to keep f = find(T); % find the location of the 1's f = f(randperm(...

6 years ago | 1

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Answered
Custom help information on structure fields
See this discussion: https://www.mathworks.com/matlabcentral/answers/480829-what-is-the-best-way-to-insure-that-all-of-my-funct...

6 years ago | 2

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Answered
Error using * Matrix dimensions must agree.
Change this piv=A(i:i); to this piv=A(i,i); And change this fac=A(j:i)./piv; to this fac=A(j,i)./piv;

6 years ago | 0

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how to print multiple variables with strings in between ?
You could use fprintf. E.g. >> a = 5; >> b = 7; >> fprintf("Variable a equals: %g\n",a); Variable a equals: 5 >> fprintf("V...

6 years ago | 2

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Answered
Swapping last matrix columns
From your description, I don't see how your code works for anything other that inputs having two columns. I would guess that thi...

6 years ago | 1

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C/Fortran callback to MATLAB
Maybe this can give you the framework you need. I have made some assumptions about how things are connected. You pass in a cha...

6 years ago | 0

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Common numbers between arrays
You could write some code using the intersect( ) function for this. E.g., the first result >> A = {[1,2,3], [3 4 5 6], [3 7 8 ...

6 years ago | 1

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Answered
How could I solve the problem of if statement for even and odd values?
mod(N,1) does not determine if a number is even or odd. You would want something like mod(N,2)==0 or mod(N,2)~=0. E.g., mod(Z...

6 years ago | 0

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Parse/Syntax Error
lamda**2 is Fortran. I presume you want lamda^2 instead

6 years ago | 0

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How can plot every n-th element in a vector AND the last element?
If you don't care about possibly overplotting that last point twice, then simply n = 10; result = [p(n:n:end) p(end)]; If you...

6 years ago | 0

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Answered
element-wise exponential of matrix returns all 1s
Your calculations are sensitive to the input numbers. E.g., >> format longg >> thetas(1) ans = 12566.3706143592 >...

6 years ago | 0

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Subscript indicies must either be real positive integers or logicals
... rho((4/3) ... should be ... rho*((4/3) ...

6 years ago | 0