Dealing data with text and numerical in .txt file

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"

Answer 1

[Dyuman Joshi]

%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

[Ismita]

Thank you very much!

[Dyuman Joshi]

You're welcome!

If my answer solved your problem, please consider accepting the answer.

Answer 2

[Stephen23]

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

Answer 3

[Star Strider]

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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