I am getting an error using interp1

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Ambali Odebowale
Ambali Odebowale 2022-2-21
评论： Ambali Odebowale 2022-12-23
I have table of n and k vs frequency for TiO2 and I am trying to plot the corresponding dielectrics. Here is the code
function [frequency, dielectric_function] = plot_optical_constants_TiO2(n);
color_1 = [0.7411, 0, 0.1490];
color_2 = [0.9412, 0.2314, 0.1255];
color_3 = [0.9922, 0.5529, 0.2353];
color_4 = [0.9961, 0.8, 0.3608];
color_5 = [1, 1.0, 0.3980];
set(0,'defaultaxesfontsize',20);
set(0,'defaulttextfontsize',20);
set(0,'defaultaxeslinewidth',2);
set(0,'defaultlinemarkersize',10);
set(0,'DefaultFigureWindowStyle','docked');
set(0,'DefaultFigurePosition', [0 918 1120 840]);
N_w = 1000 ; % number of points in frequency span
N_k = 2000 ; % number of points in wavevector span
w_min = 5E12;
w_max = 1e15;
[w,k_r] = ndgrid( (linspace(w_min,w_max,N_w)) , (linspace(0,50E6,N_k)) );
e_TiO2 = dlmread('e_TiO2.txt');
w_Ge = e_TiO2(:,1);
e_TiO2 = e_TiO2(:,2) + 1i*e_TiO2(:,3);
e_TiO2_interp = interp1(w_Ge, e_TiO2, w);
dielectric_function = e_TiO2_interp;
frequency = w(:,1);
figure(4)
hh = plot(w(:,1), real(e_TiO2_interp(:,1)),w(:,1), imag(e_TiO2_interp(:,1)));
legend('\epsilon''_{TiO2}', '\epsilon''''_{TiO2}')
ylabel('Dielectric Function')
xlabel('Frequency, {\omega} (rad/s)')
set(hh(1), 'color', color_3)
set(hh(2), 'color', color_1)
xlim([5e12 1e15])
end
The error is pasted below:
Error using matlab.internal.math.interp1
Sample points must be unique.
Error in interp1 (line 188)
VqLite = matlab.internal.math.interp1(X,V,method,method,Xqcol);
Error in plot_optical_constants_TiO2 (line 24)
e_TiO2_interp = interp1(w_Ge, e_TiO2, w);
  8 个评论
显示 6更早的评论
Yordani
Yordani 2022-12-23
Hello Ambali I would like to contact you to discuss this code designed for NFRHT. Can you give me your cell phone number or email? Thank you

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采纳的回答

DGM
DGM 2022-2-22
Ran in:
Strip out all the multiply-defined points:
color_1 = [0.7411, 0, 0.1490];
color_2 = [0.9412, 0.2314, 0.1255];
color_3 = [0.9922, 0.5529, 0.2353];
color_4 = [0.9961, 0.8, 0.3608];
color_5 = [1, 1.0, 0.3980];
set(0,'defaultaxesfontsize',20);
set(0,'defaulttextfontsize',20);
set(0,'defaultaxeslinewidth',2);
set(0,'defaultlinemarkersize',10);
set(0,'DefaultFigureWindowStyle','docked');
set(0,'DefaultFigurePosition', [0 918 1120 840]);
N_w = 1000 ; % number of points in frequency span
N_k = 2000 ; % number of points in wavevector span
w_min = 5E12;
w_max = 1e15;
[w,k_r] = ndgrid( (linspace(w_min,w_max,N_w)) , (linspace(0,50E6,N_k)) );
e_TiO2 = dlmread('TiO2.txt');
w_Ge = e_TiO2(:,1);
[w_Ge uidx] = unique(w_Ge);
e_TiO2 = e_TiO2(:,2) + 1i*e_TiO2(:,3);
e_TiO2 = e_TiO2(uidx);
e_TiO2_interp = interp1(w_Ge, e_TiO2, w);
dielectric_function = e_TiO2_interp;
frequency = w(:,1);
figure(4)
hh = plot(w(:,1), real(e_TiO2_interp(:,1)),w(:,1), imag(e_TiO2_interp(:,1)));
legend('\epsilon''_{TiO2}', '\epsilon''''_{TiO2}')
ylabel('Dielectric Function')
xlabel('Frequency, {\omega} (rad/s)')
set(hh(1), 'color', color_3)
set(hh(2), 'color', color_1)
xlim([5e12 1e15])

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