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#### Get Instant Assignment Help # Reading The Text File Data Into Matlab And Plotting Assignment Help We at Assignmenthelp.net offer the wide range of online tutoring services free matlab online help in matlab project help. matlab Assignment Help service providing batch reactor residence time matlab, breakevenanalysis con matlab, wheatstone bridge ammeter current matlab, stock replenishment and distribution planning matlab, simple harmonic oscillator matlab and scientific computing matlab projects homework.

## Reading the text file data into MATLAB and plotting Assignment Help

Challenge:  Read the text file data into MATLAB and plot the bacteria formation rate (dN/dt) and label your plot appropriately.

## Matlab code is given below

% read and plots the data

clc;

clear;

## Reading The Text File Data Into Matlab And Plotting Assignment Help By Online Tutoring and Guided Sessions from AssignmentHelp.Net

% curbe fitting to different segments and display on screen

clc;

clear;

[data x y] = readplot('experimental_dNdt.txt',6,2);

datap1 = data(1:125,:);

datap2 = data(126:225,:);

datap3 = data(226:end,:);

p1 = polyfit(datap1(:,1),datap1(:,2),3);

p2 = polyfit(datap2(:,1),datap2(:,2),3);

p3 = polyfit(datap3(:,1),datap3(:,2),3);

f1 = polyval(p1,1:125);

f2 = polyval(p2,126:225);

f3 = polyval(p3,226:477);

f = [f1 f2 f3];

plot(x,y,'r-',x,f,'b-');

display('Coefficient of Fit Curves');

display(p1);

display(p2);

display(p3);

## Applicaton of Newton-Raphson method for finding maxim and minima using Matlan

Use the Newton-Raphson method to identify the time at which the number of bacteria (N) passes through a maximum.

% To find point the point at which N reaches a maximum, we have to find a

% point where the its derivative is zero. We can see from the curve that it

% reaches zero at only one point and that point is what we need to find

% using newton-raphson method.

clc;

clear;

[data x y] = readplot('experimental_dNdt.txt',6,2);

datap1 = data(1:125,:);

datap2 = data(126:225,:);

datap3 = data(226:end,:);

p1 = polyfit(datap1(:,1),datap1(:,2),3);

p2 = polyfit(datap2(:,1),datap2(:,2),3);

p3 = polyfit(datap3(:,1),datap3(:,2),3);

% now try to find the zero of the approximated polynomials using

% newton-raphson and display them . All real and imaginary roots are

% displayed

r1 = newtonraph(p1);

display('Point of max value of bacteria is time:')

for i = 1:length(r1)

if r1(i)>=1 && r1(i)<= 125

display((r1(i)));

end

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for help contact to our website

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r3 = newtonraph(p3);

for i = 1:length(r3)

if r3(i)>=226 && r3(i)<= 477

display((r3(i)));

end

end

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