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Deal all.

I need you help to convert this equation to matlab code

I spend a lot of time to write it but it doesn't work. Thank you.

Walter Roberson
on 1 Apr 2018

Are you permitted to use the symbolic toolbox?

Is the question about providing some kind of symbolic proof, or is it about calculation of the formula using finite precision and a particular numeric input?

Roger Stafford
on 1 Apr 2018

N = 100; % <-- Choose some large number

s = x;

for n = 2*N-1:-2:1

s = x - s*x^2/((n+2)*(n+1));

end

(I think you meant to take the limit as N approaches infinity, not x.)

kalai selvi
on 15 Sep 2020

pls answer this question ...how to write the equation into code

Walter Roberson
on 15 Sep 2020

π is written as pi in MATLAB.

exp of an expression is written as exp(expression) in MATLAB.

is written as sqrt(expression) in MATLAB.

Kunwar Pal Singh
on 26 Apr 2021

please answer this....how to write this equation into MATLAB CODE

Walter Roberson
on 26 Apr 2021

%these variables must be defined in a way appropriate for your situation

S_N = rand() * 10

theta = randn() * 2 * pi

l = randi([2 10])

b_1 = rand()

c_11 = rand()

t_year = randi([1950 2049])

d_11 = rand()

t_1 = rand()

t_x = t_1 + rand()

lambda_a = randi([500 579])

LOTF_a = rand()

P = rand()

K_l = rand()

k_0 = rand()

t_tau = randi(10)

overhaulcost_a = 1000 + rand()*100

%the work

syms t

part1 = int(S_N .* cos(theta) .* l .* b_1 .* t_year .* d_11, t, t_1, t_x);

part2 = int(lambda_a .* LOTF_a, t, t_1, t_x);

part3 = int(P*K_l .* t_year + P .* k_0 .* l .* l .* t_tau, t, t_1, t_x);

part4 = overhaulcost_a ;

result = part1 - part2 - part3 - part4;

Jakub Laznovsky
on 19 May 2021

Hi guys, can you please help me with conversion this piece of code to the mathematical equation?

It i a simple 3D mask proceeding the image, and searching for adjoining number one and number two. Thank you in advance.

Code:

m1=[0 0 0; 0 1 0; 0 0 0];

m2=[0 1 0; 1 1 1; 0 1 0];

mask=zeros(3,3,3);

mask(:,:,1)=m1;mask(:,:,2)=m2;mask(:,:,3)=m1;

for i=2:size(image,1)-1

for j=2:size(image,2)-1

for k=2:size(image,3)-1

help_var=image(i-1:i+1,j-1:j+1,k-1:k+1);

if sum(unique(help_var(mask==1)))==3

new_image(i,j,k)=3; %marks adjoining pixel with number 3

end

end

end

end

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