Please help me to put a for loop for vectors that increases number of rows with each loop

Hi all,

I am modelling a Particle Size Distribution using MATLAB which increases in the number of columns as chewing number increases.

So as a start, at chew 1, I have an input vector of X number of rows (these are the particle sizes) and 1 column (chew number 1), which was generated from a random Normal distribution. This is the initial number of particles. The output of my model is a new distribution, with a new number of rows. I will then use this output to become the next input of my model for chew 2, and the output for chew 2 (again a new number of rows) will be used as an input for the next chewing number.

Just a brief preview of my current code;

%Input

Chew_no=4; %This will be the number of columns for my input growing matrix

%When chew no 1, Dp=Dp %This is my first input

Dp=[4.74995832162336;4.78857686834444;4.81834297133678;4.81927711438771;4.83452623567326;4.83525188874587];

%Series of Calculations to get Dpnew

Dpnew(1)=[0.711929619334532;0.711929619334532;0.711929619334532;0.711929619334532;0.711929619334532;0.711929619334532;0.711929619334532;0.711929619334532;0.711929619334532];%This is my first output which will be the next input for the next chew/loop..

%When chew no 2, Dp=Dpnew(1)

%Series of Calculations to get Dpnew

Dpnew(2)=[]; %New vector of higher number of rows than Dpnew(1) in column 2

%When chew no 3, Dp=Dpnew(2);

% Series of calculations to get Dpnew

Dpnew(3)=[]; %New vector of higher number of rows than Dpnew(2) in column 3

%When chew no 3, Dp=Dpnew(3);

% Series of Calculations to get Dp new Dpnew(4)=[]; %New vector of higher number of rows than Dpnew(3) in column 4

%and so on...

My question is, how do I put a for loop inside the code as the number of rows increases with the loop? I keep getting errors such as 'Subscripted assignment dimension mismatch'

Any help is much appreciated!!

Cheers,

How

[Walter Roberson]

How does this differ from your previous https://www.mathworks.com/matlabcentral/answers/393553-how-to-create-new-column-of-data-that-increases-number-of-rows-after-each-iteration-of-a-for-loop

[Syahmeer How]

Hi Walter, it is the same question except that the current one is a simpler version of my older one. Just thought I should simplify the codes to make it easier for people to understand :) I should probably delete my previous post. Do you have an tips on how should I approach this problem?

Answer 1

[KSSV]

REad about Cell. You can save the data into a cell.

[Syahmeer How]

Thanks for the reply KSSV. I actually tried Cell before but it takes ages (kept running for hours and didn’t stop) to run it. Do you know if there is another approach to solve this other than using cell?

Cheers