Community Profile

Davide Masiello

Paul Scherrer Institut (PSI)

Last seen: Today 2017 年からアクティブ

Programming Languages:
MATLAB
Spoken Languages:
English, Italian
Professional Interests:
Chemical Kinetics, Fluid Dynamics, Chemical Engineering, Heat and Mass Transfer

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A compact way to (i) sum two rows and two columns and then (ii) remove one of the two summed rows and one of the two summed columns
Your way is already quite compact. Maybe what you want to avoid is having to concatenate. Then, you could try this. x1 = [1 0 ...

3日 前 | 0

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How to form a matrix based on the order of input
Input= [110 101 011 111 100 001 010]; M = Input == sort(Input)'

6日 前 | 0

function handle as array
That's because mtimes(a,b) = a*b, and if a is 4x4 and b is 4x1 than the operation yields a 4x1 array. I think what you might wa...

6日 前 | 0

Identify the duration of zero values and count the number of such zero regions
Use regionprops time = 0:100; signal = rand(size(time)); signal([3:6,15:21,43:55,61:64,87:92]) = 0; plot(time,signal) r = r...

7日 前 | 0

How to count number of ones and zeros in a binary number?
I will assume that your binary numbers are stored as a character array, which is how Matlab normally works, e.g. A = dec2bin(20...

9日 前 | 1

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Solving a differential equation
Since you have data for V and C you could fit them with the analytical solution of the differential equation. Let's assume this...

10日 前 | 0

solving a dynamic equation
Hi @sam - you did not provide enough info for us to try and give a complete answer, but I did some guessing and came up with a s...

11日 前 | 0

Forward Euler solution plotting for dy/dt=y^2-y^3
There are a couple of issues with your code 1) Indexes in MatLab start at 1, not 0, so y(0) is not valid syntax and must be rep...

23日 前 | 0

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Dot indexing is not supported for variables of this type.
You are assuming that sh_16_data is a structure. Instead, do sh_16_freq = sh_16_data(:,2)

28日 前 | 0

find columns adjacent to logical values
Reductive example. Assume this is your matrix A = rand(10,5) and let's assume your logical criteria is that you want to extra...

29日 前 | 0

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Loop plotting for individual years
There's no legend in the example below, because I am not sure what you wanted to do with the cellfun function. Nevertheless, it...

30日 前 | 0

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How to vertically concatenate many tables produced from a for loop
I would try something like this M = []; for k=1:numel(A) % automatically brings in the correct amount of tables M = [M;re...

30日 前 | 0

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Duplicating an entire vector
A=[1 2 3 4]; repmat(A,1,3)

30日 前 | 1

plotting graph with 2 different size of vector
Applying diff to a Nx1 array produces an (N-1)x1 array, hence your problem. In truth, you are not really calculating the deriva...

30日 前 | 0

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Build a matrix with a gradual value of intensity and an horizontal line with a constant value
A = repmat(linspace(0,1,1000),500,1); A(220:280,:) = 0.5; imshow(A)

30日 前 | 0

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removing specified data from variable
I think the following code is a simpler way of achieving your task, but it does not implement the "pulling a number from a rando...

Call different functions inside a function
The way you have explained it in your question is already correct. See the example below. %% Main script mainfunction %% Mai...

Create an airfoil in MATLAB
From the wikipedia page https://en.wikipedia.org/wiki/NACA_airfoil t = 0.25; % maximum thickness as a fraction of the ch...

Saving Multiple .dat files
This should work A = rand(2000,1000); for col = 1:size(A,2) filename = ['Column_',num2str(col),'.dat']; writematri...

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How do I find slope for large dataset?
Just do A = diff(data)./diff(time);

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How do i set up a legend for a graph with variable parameters?
t = -2:0.1:4; d = 1; c = 1; A = 1:0.2:2; figure hold on for i = 1:length(A) y= A(i) * (t - d).*(t-c) ; plot (...

Generate Alternating Tones Based On Number Of Cycles
I am still quite unsure if this is what you are asking, but I will give it a go. [t,w] = wave(465); plot(t,w) function [t,f] ...

Interpolate data to present with limited size of data
x=rand(5,7) figure contourf(x,'LineColor','none') shading interp axis equal off

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Getting A blank Graph
See below for a correct use of indexing with a for loop x = 0:0.01:1; for i = 1:length(x) y1(i) = (0.5*x(i)^5)-(0.6*x(i)^4)...

trying to plot 3 variables in 3d
surf can handle only matrices, so this is what you want to do theta= linspace(.01, .55); %for thetamax = 32 degrees M=linspace...

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While loop with all elements meeting the conditions
t = -100:200; F = t; indices = 1:100; while all(F(indices)<0) indices = indices + 1; end

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Wrong sum 50 + 0.01
I don't think this is an issue at all, but it rather has to do with the max accuracy MatLab uses to store numbers. Such accurac...

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solve multiple equation in one variable
I think the problem is that you have 5 equations and 4 variables, because p1 does not appear anywhere in the system. Therefore ...

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How can i get a logical vector for all rows when compare each row of a column matrix with a another row column matrix
You can simply do A = randi(10,5) B = randi(10,5) l = A == B

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