I am getting error in the line load SPR_data.txt after intializing n_Au

Question

Ananya Banerjee 2021-12-14

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https://ww2.mathworks.cn/matlabcentral/answers/1610765-i-am-getting-error-in-the-line-load-spr_data-txt-after-intializing-n_au

回答： SACHIN KHANDELWAL 2024-4-19

在 MATLAB Online 中打开

SPR_matrix_profile_comparison_v2()

Warning: Ignoring extra legend entries.

Error using load
Unable to find file or directory 'SPR_data.txt'.

Error in solution>SPR_matrix_profile_comparison_v2 (line 51)
load SPR_data.txt ;

function SPR_matrix_profile_comparison_v2

%variables

n_Ma=1.493; %målt ved 589nm @ 20 C

n_buffer=1.33156; %HEPES buffer

d_Ma=1E-9;

%vinkelting

theta_start=49.01; %GRADER! !

theta_slut=54.99; %GRADER! !

thetasteps=250;

theta_start=theta_start/360*2*pi ;

theta_slut=theta_slut/360*2*pi ;

deltatheta=(theta_slut-theta_start)/(thetasteps-1);

for t =1:1:thetasteps;

theta=theta_start+deltatheta*(t-1);

vinkel(t)=theta/(2* pi)*360 ;

end

figure(1) ;

hold on

for l =2:8

d_Au=l*10E-9;

[R_list]=spr_calc(n_Ma,n_buffer,d_Ma,d_Au,vinkel,theta_start,theta_slut,deltatheta,thetasteps,theta);

% [y_data]=data_import(vinkel);

if l==2

plot( vinkel , R_list ,' k ')

end

if l==3

plot ( vinkel , R_list ,' g ')

end

if l==4

plot ( vinkel , R_list ,'m')

end

if l==5

plot ( vinkel , R_list ,'c')

end

if l==6

plot ( vinkel , R_list ,' b ')

end

if l==7

plot ( vinkel , R_list , ' y ' )

end

if l==8

plot ( vinkel , R_list , ' r ' )

end

%axis ( [ theta_start *180/ pi theta_slut *180/ pi+1e-3 0 1 ] )

legend ( '20nm' , ' 30nm' , ' 40nm' , ' 50nm' , ' 60nm' , ' 70nm' , ' 80nm' , ' Location ' , ' NorthEastOutside ' )

%l egend ( 'n_3=1.3300 ' , 'n_3=1.3340 ' , 'n_3=1.3380 ' , 'n_3=1.3420 ' , 'n_3=1.3460 ' , 'n_3=1.3500 ' , ' Locatxlabel ( ' Angle o f incidence ' )

ylabel ( ' Reflectance ' );

load SPR_data.txt ;

[ sx , sy ]= size (SPR_data) ;

for i =1:250

y_data ( i )=SPR_data( i +150 ,2)/7E4 ;

%x_data ( i )=i ;

end

% options = fitoptions ( ' NonlinearLeastSquares ' ,method ) ;

%

% [ fresult , gof , fout ]= fit (vinkel, y_data , spr_calc , options ) ;

%figure(1) ;

%hold on

%plot( vinkel , R_list )

%hold on ;

%figure ( 1 ) ;

%plot(vinkel , R_list )

%figure (2) ;

%plot(vinkel , y_data ) ;

%figure(2) ;

%plot(vinkel , R_list-y_data ) ;

end

function [R_list] = spr_calc(n_Ma,n_buffer,d_Ma,d_Au,vinkel,theta_start,theta_slut,deltatheta,thetasteps,theta)

lambda_0=780E-9;

n_glass =1.77;

n_Au=0.17-4.93i;

n_Cr=3.11982+3.44408i ; % http : / / refractive index . info/? group=METALS&material=Chromium d.11n_Au=0.17-4.93i ; %Stenberg etal . 1991

n_Ma=n_Ma;

n_buffer=n_buffer ;

d_Cr=1E-9;

d_Au=d_Au;

d_Ma=d_Ma;

% theta_start=51; %GRADER! !

% theta_slut=55; %GRADER! !

% thetasteps=250;

n1=n_glass ;

n2=n_Cr ;

n3=n_Au;

n4=n_Ma;

n5=n_buffer;

eps1=n1^2;

eps2=n2^2;

eps3=n3^2;

eps4=n4^2;

eps5=n5^2;

k=2*pi/lambda_0 ;

% theta_start=theta_start /360*2* pi ;

% theta_slut=the ta_slut /360*2* pi ;

% deltatheta=( theta_slut-theta_start ) / (thetasteps-1);

for t =1:1: thetasteps

theta=theta_start+deltatheta *( t-1);

kx=k* n_glass * sin ( theta ) ;

kz1=sqrt (-(kx^2)+k^2* eps1 ) ;

if imag ( kz1 )>0 ,

kz1=-kz1 ;

end

kz2=sqrt (-(kx^2)+k^2* eps2 ) ;

if imag ( kz2 )>0 ,

kz2=-kz2 ;

end

kz3=sqrt (-(kx^2)+k^2* eps3 ) ;

if imag ( kz3 )>0 ,

kz3=-kz3 ;

end

kz4=sqrt (-(kx^2)+k^2* eps4 ) ;

if imag ( kz4 )>0 ,

kz4=-kz4 ;

end

kz5=sqrt (-(kx^2)+k^2* eps5 ) ;

if imag ( kz5 )>0 ,

kz5=-kz5 ;

end

beta_Cr=kz2*d_Cr ; %2*pi /lambda_0 *(n_Cr*d_Cr* cos ( theta ) ) ;

beta_Au=kz3*d_Au; %2*pi /lambda_0 *(n_Au*d_Au* cos ( theta ) ) ;

beta_Ma=kz4*d_Ma; %2*pi /lambda_0 *(n_Ma*d_Ma* cos ( theta ) ) ;

L_Cr=zeros(2) ;

L_Cr(1 ,1)=exp(-1i *beta_Cr ) ;

L_Cr(2 ,2)=exp (1i *beta_Cr ) ;

L_Au=zeros(2) ;

L_Au(1 ,1)=exp(-1i *beta_Au ) ;

L_Au(2 ,2)=exp (1i *beta_Au ) ;

L_Ma=zeros(2) ;

L_Ma(1 ,1)=exp(-1i *beta_Ma ) ;

L_Ma(2 ,2)=exp (1i *beta_Ma ) ;

b1=(n1/n2 )^2*( kz2 /kz1 ) ;

b2=(n2/n3 )^2*( kz3 /kz2 ) ;

b3=(n3/n4 )^2*( kz4 /kz3 ) ;

b4=(n4/n5 )^2*( kz5 /kz4 ) ;

rho_glass_Cr=(1-b1)/(1+b1 ) ;

rho_Cr_Au=(1-b2)/(1+b2 ) ;

rho_Au_Ma=(1-b3)/(1+b3 ) ;

rho_Ma_buffer=(1-b4)/(1+b4 ) ;

tau_glass_Cr=(2*(n1/n2 ))/(1+b1 ) ;

tau_Cr_Au=(2*(n2/n3 ))/(1+b2 ) ;

tau_Au_Ma=(2*(n3/n4 ))/(1+b3 ) ;

tau_Ma_buffer=(2*(n4/n5 ))/(1+b4 ) ;

H_glass_Cr=ones (2)/ tau_glass_Cr ;

H_glass_Cr(1,2)=rho_glass_Cr / tau_glass_Cr ; %rho i s r e f l e c t i o n c o e f f i c i e n t s

H_glass_Cr(2,1)=rho_glass_Cr / tau_glass_Cr ; %rho i s r e f l e c t i o n c o e f f i c i e n t s

H_Cr_Au=ones(2)/tau_Cr_Au ;

H_Cr_Au(1,2)=rho_Cr_Au/tau_Cr_Au ; %rho i s r e f l e c t i o n c o e f f i c i e n t s

H_Cr_Au(2,1)=rho_Cr_Au/tau_Cr_Au ; %rho i s r e f l e c t i o n c o e f f i c i e n t s

H_Au_Ma=ones (2)/tau_Au_Ma ;

H_Au_Ma(1,2)=rho_Au_Ma/tau_Au_Ma ; %rho i s r e f l e c t i o n c o e f f i c i e n t s

H_Au_Ma(2,1)=rho_Au_Ma/tau_Au_Ma ; %rho i s r e f l e c t i o n c o e f f i c i e n t s

H_Ma_buffer=ones (2)/ tau_Ma_buffer ;

H_Ma_buffer(1,2)=rho_Ma_buffer/tau_Ma_buffer ; %rho i s r e f l e c t i o n c o e f f i c i e n t s

H_Ma_buffer(2,1)=rho_Ma_buffer/tau_Ma_buffer ; %rho i s r e f l e c t i o n c o e f f i c i e n t s

S_glass_buffer=H_glass_Cr*L_Cr*H_Cr_Au*L_Au*H_Au_Ma*L_Ma*H_Ma_buffer ;

R_list(1,t )=( abs(S_glass_buffer ( 1 , 2 ) / S_glass_buffer ( 2 , 2 ) ) )^2 ;

% vinkel (t)=theta /(2* pi ) * 3 6 0 ;

end

% figure(1) ;

% hold on

% plot(vinkel , R_list )

% [ sy , sx ]= s i z e ( R_l i s t ) ;

%

% for i =1:(sx-5)

% theta=the ta_start+deltatheta *(i -1);

% diff_R_list(i)=(-R_list(i)+R_list(i+5))/(5) ;

% diff_vinkel(i)=theta/(2* pi)* 360 ;

% end

%

% for i =1:(sx-6)

% theta=theta_start+deltatheta *( i-1);

% if sign ( diff_R_list ( i ))==sign ( diff_R_list (i +1))

% signchange (i)=0;

% else

% sign_note=theta /(2* pi )*360

% end

%

% figure(2)

% plot ( diff_vinkel , diff_R_list )

end

function [ y_data ] = data_import(vinkel)

load SPR_data.txt ;

[sx,sy]= size(SPR_data) ;

for i =1:250

y_data( i )=SPR_data( i +150 ,2)/7E4 ;

%x_data( i )=i ;

end

x_data=vinkel ;

% hold on ;

%

% figure(2) ;

% plot( x_data , y_data )

end

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Walter Roberson 2021-12-14

You do not write a file of that name, so it is not obvious why you expect that the file will exist ?

Certainly it does not exist on the machines of the volunteers...

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Answer 1

SACHIN KHANDELWAL 2024-4-19

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1610765-i-am-getting-error-in-the-line-load-spr_data-txt-after-intializing-n_au#answer_1444416

Hi Ananya,

After reviewing the error and the code you have provided, it appears that the issue arises because you are executing the script in the MATLAB Community.

If you have MATLAB installed, please ensure you are using the same working directory where the file 'SPR_data.txt' is located. Alternatively, you can use MATLAB Online to continue with your workflow.

I hope the information provided above will be helpful.

Thanks!

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