Dealing data with text and numerical in .txt file

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Ismita
Ismita 2024 年 2 月 17 日
回答済み: Star Strider 2024 年 2 月 17 日
I have a txt file containing some data as follows: how to visualize using Matlab? I request your suggestions.
"k: 0.1, omega_real: 20001, omega_imag: 11283.8
k: 0.30101, omega_real: 2208.33, omega_imag: 1245.35
k: 0.50202, omega_real: 794.574, omega_imag: 447.726
k: 0.70303, omega_real: 405.652, omega_imag: 228.301
k: 0.90404, omega_real: 245.711, omega_imag: 138.064
k: 1.10505, omega_real: 164.782, omega_imag: 92.404
k: 1.30606, omega_real: 118.247, omega_imag: 66.1498
k: 1.50707, omega_real: 89.0568, omega_imag: 49.6807
k: 1.70808, omega_real: 69.5509, omega_imag: 38.6757
k: 1.90909, omega_real: 55.8753, omega_imag: 30.9601
k: 2.1101, omega_real: 45.9183, omega_imag: 25.3424
k: 2.31111, omega_real: 38.4445, omega_imag: 21.1258
k: 2.51212, omega_real: 32.6919, omega_imag: 17.8803
k: 2.71313, omega_real: 28.1699, omega_imag: 15.329
k: 2.91414, omega_real: 24.551, omega_imag: 13.2872"

回答 (3 件)

Dyuman Joshi
Dyuman Joshi 2024 年 2 月 17 日
%display the contents of the file
type data.txt
k: 0.1, omega_real: 20001, omega_imag: 11283.8 k: 0.30101, omega_real: 2208.33, omega_imag: 1245.35 k: 0.50202, omega_real: 794.574, omega_imag: 447.726 k: 0.70303, omega_real: 405.652, omega_imag: 228.301 k: 0.90404, omega_real: 245.711, omega_imag: 138.064 k: 1.10505, omega_real: 164.782, omega_imag: 92.404 k: 1.30606, omega_real: 118.247, omega_imag: 66.1498 k: 1.50707, omega_real: 89.0568, omega_imag: 49.6807 k: 1.70808, omega_real: 69.5509, omega_imag: 38.6757 k: 1.90909, omega_real: 55.8753, omega_imag: 30.9601 k: 2.1101, omega_real: 45.9183, omega_imag: 25.3424 k: 2.31111, omega_real: 38.4445, omega_imag: 21.1258 k: 2.51212, omega_real: 32.6919, omega_imag: 17.8803 k: 2.71313, omega_real: 28.1699, omega_imag: 15.329 k: 2.91414, omega_real: 24.551, omega_imag: 13.2872
%read the file
fID = fopen('data.txt')
fID = 3
%read the data in the given format - as the data is read in column order by fscanf,
%provide the dimensions i.e. 3 columns and all the rows, and transpose the final output
data = fscanf(fID, 'k: %f, omega_real: %f, omega_imag: %f\n', [3 Inf]).'
data = 15×3
1.0e+04 * 0.0000 2.0001 1.1284 0.0000 0.2208 0.1245 0.0001 0.0795 0.0448 0.0001 0.0406 0.0228 0.0001 0.0246 0.0138 0.0001 0.0165 0.0092 0.0001 0.0118 0.0066 0.0002 0.0089 0.0050 0.0002 0.0070 0.0039 0.0002 0.0056 0.0031
  2 件のコメント
Ismita
Ismita 2024 年 2 月 17 日
Thank you very much!
Dyuman Joshi
Dyuman Joshi 2024 年 2 月 17 日
You're welcome!
If my answer solved your problem, please consider accepting the answer.

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Stephen23
Stephen23 2024 年 2 月 17 日
T = readtable('data.txt', 'Delimiter',{' ',':',','}, 'MultipleDelimsAsOne',true)
T = 15×6 table
Var1 Var2 Var3 Var4 Var5 Var6 _____ _______ ______________ ______ ______________ ______ {'k'} 0.1 {'omega_real'} 20001 {'omega_imag'} 11284 {'k'} 0.30101 {'omega_real'} 2208.3 {'omega_imag'} 1245.3 {'k'} 0.50202 {'omega_real'} 794.57 {'omega_imag'} 447.73 {'k'} 0.70303 {'omega_real'} 405.65 {'omega_imag'} 228.3 {'k'} 0.90404 {'omega_real'} 245.71 {'omega_imag'} 138.06 {'k'} 1.1051 {'omega_real'} 164.78 {'omega_imag'} 92.404 {'k'} 1.3061 {'omega_real'} 118.25 {'omega_imag'} 66.15 {'k'} 1.5071 {'omega_real'} 89.057 {'omega_imag'} 49.681 {'k'} 1.7081 {'omega_real'} 69.551 {'omega_imag'} 38.676 {'k'} 1.9091 {'omega_real'} 55.875 {'omega_imag'} 30.96 {'k'} 2.1101 {'omega_real'} 45.918 {'omega_imag'} 25.342 {'k'} 2.3111 {'omega_real'} 38.444 {'omega_imag'} 21.126 {'k'} 2.5121 {'omega_real'} 32.692 {'omega_imag'} 17.88 {'k'} 2.7131 {'omega_real'} 28.17 {'omega_imag'} 15.329 {'k'} 2.9141 {'omega_real'} 24.551 {'omega_imag'} 13.287

Star Strider
Star Strider 2024 年 2 月 17 日
I am not certain what you intend by ‘visualize’.
Perhaps this —
T1 = readtable('M I T 2024 02 17.txt', 'Delimiter',{',',':'})
T1 = 15×6 table
Var1 Var2 Var3 Var4 Var5 Var6 _____ _______ ______________ ______ ______________ ______ {'k'} 0.1 {'omega_real'} 20001 {'omega_imag'} 11284 {'k'} 0.30101 {'omega_real'} 2208.3 {'omega_imag'} 1245.3 {'k'} 0.50202 {'omega_real'} 794.57 {'omega_imag'} 447.73 {'k'} 0.70303 {'omega_real'} 405.65 {'omega_imag'} 228.3 {'k'} 0.90404 {'omega_real'} 245.71 {'omega_imag'} 138.06 {'k'} 1.1051 {'omega_real'} 164.78 {'omega_imag'} 92.404 {'k'} 1.3061 {'omega_real'} 118.25 {'omega_imag'} 66.15 {'k'} 1.5071 {'omega_real'} 89.057 {'omega_imag'} 49.681 {'k'} 1.7081 {'omega_real'} 69.551 {'omega_imag'} 38.676 {'k'} 1.9091 {'omega_real'} 55.875 {'omega_imag'} 30.96 {'k'} 2.1101 {'omega_real'} 45.918 {'omega_imag'} 25.342 {'k'} 2.3111 {'omega_real'} 38.444 {'omega_imag'} 21.126 {'k'} 2.5121 {'omega_real'} 32.692 {'omega_imag'} 17.88 {'k'} 2.7131 {'omega_real'} 28.17 {'omega_imag'} 15.329 {'k'} 2.9141 {'omega_real'} 24.551 {'omega_imag'} 13.287
Lv = varfun(@(x)~isnumeric(x),T1);
Ln = find(table2array(Lv));
k = find(table2array(varfun(@(x)contains(x,'k'), T1(1,Ln))));
Re = find(table2array(varfun(@(x)contains(x,'real'), T1(1,Ln))));
Im = find(table2array(varfun(@(x)contains(x,'imag'), T1(1,Ln))));
k = table2array(T1(:,Ln(k)+1));
Real = table2array(T1(:,Ln(Re)+1));
Imag = table2array(T1(:,Ln(Im)+1));
figure
plot(k, Real, 'DisplayName','Real', 'LineWidth',2)
hold on
plot(k, Imag, 'DisplayName','Imag', 'LineWidth',2)
plot(k, abs(Real+1j*Imag), 'DisplayName','Abs', 'LineWidth',2)
hold off
grid
Ax = gca;
Ax.YScale = 'log';
xlabel('k')
ylabel('Magnitude')
legend('Location',' best')
.

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