# Davide Masiello

### Paul Scherrer Institut (PSI)

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**Programming Languages:**

MATLAB

**Spoken Languages:**

English, Italian

**Professional Interests:**

Chemical Kinetics, Fluid Dynamics, Chemical Engineering, Heat and Mass Transfer

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**Feeds**

Insert zeros in random positions following another zero

This should work without the need for a for loop. X = [2 1 0 4 5 0 778 90 0 3 88 0 77 66 0 12 23 0 45 80 0 89 67 0 34 67 0 76 3...

5 maanden ago | 0

Modelling with 2 input variables and 1 output variable

Hello - I would recommend reading the documentation of the function fit.

5 maanden ago | 0

Array indices must be positive integers or logical values.

The problem is in the convergence check step, where you try to evaluate eta at n-1 even when n = 1. Adding n > 1 as additional ...

8 maanden ago | 0

Calculating the area of overlapping polgyons

How about this? % Clear the workspace and close all figures clear,clc % Define the vertices of the polygons polygon1 = [0,...

9 maanden ago | 0

How to morph a shape into another

I guess it boils down to what mapping you choose from the points of shape 1 to the points of shape 2. Let's take your case for ...

9 maanden ago | 1

| accepted

How do I shade the area between two curves on a plot that is generated by arrays?

Use the patch function. x1 = [1 2 3]; y1 = [2 5 8]; x2 = [1 2.5 3.5]; y2 = [1 6 3]; hold on patch([x1 flip(x2)], [y1 fli...

9 maanden ago | 1

| accepted

Combining legend data ?

Here's an example with made up functions (your code was too slow on the browser). Is this what you're looking for? y = linspa...

9 maanden ago | 0

Is it possible to programmatically suppress figure roll-over menu (zoom, rotate, etc)?

This should work, but it also suppresses the fixed toolbar above the figure f = figure; f.ToolBar = 'none';

9 maanden ago | 0

Solve for pressure swing adsorption cycle for two gases in one bed.

Hi @Samridh Sharma, please see the modifications I made to the code and the resulting output. Please let me know if you have fu...

9 maanden ago | 0

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Solving simultaneous set of differential equations for range of values to get desired set output

I'd recommend taking a look at the material at the following link https://ch.mathworks.com/help/matlab/math/boundary-value-prob...

ongeveer een jaar ago | 0

Draw 1 hyperboloid with equation -0.2x^2 - 0.2y^2 +z^2 =1 with colormap jet

[x,y] = meshgrid(linspace(-10,10,100)); z = sqrt(1+0.2*x.^2+0.2*y.^2); Then you can plot it in many ways. Examples figure...

ongeveer een jaar ago | 0

ODE simulation: issue with the size of arrays

In addition to my comment above, here's a solution to your problem. It's based on the fact that you can specify tspan as a vect...

ongeveer een jaar ago | 0

How to do custom equation (non linear) regression?

Assume these are your experimental data x = linspace(0,20,30); y = rand(size(x))/3+(pi*x.^(sqrt(2)/2))./(26.1-x); figure(1) ...

ongeveer een jaar ago | 0

help with curve fitting with a data function

Just needed better initial guesses, I think data = readmatrix('ottica10.txt'); M = 2; myfun = @(p,x) 1/M*exp(-p(1)*0.5*x).*ab...

ongeveer een jaar ago | 0

| accepted

Hello! How to define on which plane lies a given point with coordinates? I have coordinates of plane and normal

Four points can be verified to belong on the same plane if the determinant of the matrix is equal to zero. I'd translate tha...

ongeveer een jaar ago | 0

Interpolation of given data in 2d domain

Example xdata = linspace(1,10,10) ydata = linspace(0,1,11) zdata = rand(length(ydata),length(xdata)) x0 = [2.5 3.5 4.5 5.5];...

ongeveer een jaar ago | 0

How to include NaN elements in an array based on a condition?

a = [2 4 6 12 14 18]; A = a(1):2:a(end); new_a = zeros(size(A)); idx = any(a'== A,1); new_a(idx) = a; new_a(~idx) = nan; n...

ongeveer een jaar ago | 0

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Minimize the sum of squared errors between the experimental and predicted data in order to calculate two parameters

You can use MatLab's fmincon. z = [0.006;0.012;0.018;0.024;0.03;0.046;0.069;0.091;0.122;0.137;0.152;0.162]; u_exp = [0.709...

ongeveer een jaar ago | 0

| accepted

Why do I receive "Not enough input arguments"? or How can I better code this ODE?

Here's a correct version of your code. 1) Time span and initial conditions must be in the same file as the ode solver, not sure...

ongeveer een jaar ago | 1

I have solved a set of three coupled odes in MATLAB. I have to plot another function which is a function of one of these odes. How this can be done?

If none of the differential equations you are solving depends on deln, then you can compute it after solving the ODE system. To...

ongeveer een jaar ago | 1

| accepted

In this code, I want to find out slope at every value of x?

You could use the gradient function provided by MatLab. x=[10.33 10.331 10.332 10.333 10.334 10.335 10.336 10.337 10.338 10.339...

ongeveer een jaar ago | 0

How to plot scatter plot with conditions?

data = readmatrix('table.xlsx'); time = data(:,1); PW = data(:,2); You can identify all the indexes for which the differenc...

ongeveer een jaar ago | 0

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How do I exclude values in linspace?

Hi @lea.c, I have several comments about your code. 1) MatLab already implements a function called integral, so I would recomme...

ongeveer een jaar ago | 0

Loop over initial guesses with fsolve

Try with func=@f; x0=[1:0.1:1.9;1:0.1:1.9;1:0.1:1.9;1:0.1:1.9;0.01:0.01:0.1;0.01:0.01:0.1;0.01:0.01:0.1]; x = zeros(10,7); ...

ongeveer een jaar ago | 1

| accepted

Help with numerical integral

I guess this is what you're looking for e=0.1; f=@(x)exp(x)./(1+x); a=0.5; b=1.1; n=2; h=(b-a)/n; i=1:1:n-1; S=f(a...

ongeveer een jaar ago | 0

Legend with certain number of rows and columns

Use legendflex from file exchange. x = linspace(0,1,1000); n = (1:6)'; y = x.^n; p = plot(x,y); title('y = x^n') legendf...

ongeveer een jaar ago | 1

| accepted

Creating a row vector of combinations?

You could use nchoosek. The example below is from -3 to 3 for memory issues (you'll generate a humongous matrix). Just substitut...

ongeveer een jaar ago | 0

| accepted

How to remove the zeros from the array upon breaking out of the for loop?

Would this suit your purpose? RHo = 0.5; % Relative Humidity air [%] M= 0.018; % molar mass of water mol...

ongeveer een jaar ago | 0

How o define two different data set of (t , T) for an ode solver that it's variables are (t , C)?

I think your code is fine, below you can see a slightly different approach that uses interpolation to define the T(t) dependence...

ongeveer een jaar ago | 0

| accepted

Create a row vector comparing strings in a for loop

index = []; s1 = { 'FMO1','FMO2','FMO3','FMO4', 'BAO1', 'BAO2', 'BAO3', 'BAO4'}; s2 = {'mean','FMO1','BAO4','FMO2'}; for k =...

meer dan een jaar ago | 0

| accepted