Matlab structure program and difference program and degree program

1 structure program

clc;

clear all;

close all;

%s=struct('name','manoj','age',25,'empid',16133);

s=struct('name',{'manoj','manu'},'age',{25,24},'empid',{16133,16179})

s.name

s.age

s.empid

% also structure can be initialized by other method like

patient.name='man'; % here patient is structure and name is a field

patient.age=25;

patient.bill=2000;

%similarly for patient 2(for array of structure)

patient(2).name='mani'; % here patient is structure and name is a field

patient(2).age=24;

patient(2).bill=3000;

patient(1) %to display patient 1 record

patient(2) %to display patient 2 record similarly patient(2).name, patient(1).bill we can use

%for deleting a field in structure we use [] or rmfield

patient(2)=[] %patient2 record will be deleted

clc;

clear all;

close all;

a=dsolve('Dy=2*y+t');

disp(a);

b=dsolve('D2y=2*y+t','y(0)=1,Dy(1)=1');

disp(b);

clc;

clear all;

close all;

x=[-2:.01:4];

y=3*x.^3-26*x+6;

yd=9*x.^2-26;

ydd=18*x;

plot(x,y,'-b')

line(x,yd,'color','r')

line(x,ydd,'color','g');

title('Differentiation graph','color','r','fontsize',20);

text(-1,37,'\leftarrowNo derivative','color','b','edgecolor','k','linewidth',3);

text(.5,-30,'\uparrowFirst derivative','color','r','edgecolor','k','linewidth',3);

text(1,-20,'\leftarrow2nd derivative','color','g','edgecolor','k','linewidth',3);

legend('Equation','first derivative','2nd derivative',0);

xlabel('Time','color','m');

ylabel('Amplitude','color','m');