How to import data to draw bode
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I tested the data as follows
*Frequency....Out-abs..... Out-phase
10...... 0.0911222683470981..... -1.58847081420007
17.1132830416178 ......0.155513705289354 ......-1.59826007442724
29.2864456462524 ......0.265372788697364 ......-1.61337362876168
50.1187233627272 ......0.452875507309409...... -1.63924925736688
85.7695898590894...... 0.771380837522393...... -1.6844579215245
146.779926762207...... 1.30422486175599 ......-1.76177744417405
251.188643150958...... 2.15885228954428...... -1.88922949657677
429.866234708228 ......3.38909945622017 ......-2.08389456518048
735.642254459642...... 4.79331476991719 ......-2.33778424860481
1258.92541179417 ......5.90723048305756 ......-2.59657088827632
2154.43469003188 ......6.51210885390879 ......-2.80121801151038
3686.94506451958 ......6.76551329794937 ......-2.93773717631133
6309.57344480193 ......6.85906013908311 ......-3.02175637289138
10797.7516232771 ......6.89190068991012 ......-3.07200435455205
18478.4979742229 ......6.9032185997441 ...... -3.10201666772075
31622.7766016838 ......6.90708374137897 ......-3.12039586346281
54116.9526546464 ......6.90836924161824 ......-3.13252146311361
92611.8728128794...... 6.90870360455884 ......-3.14196763982071
158489.319246112...... 6.90851104747202...... -3.15152485034634
271227.257933203...... 6.90754724630841 ......-3.16401689981387
464158.883361278 ......6.90459064111762 ......-3.18312952818843
794328.234724283 ......6.8959080205459 ......-3.21447528466877
1359356.39087853...... 6.87065827244468 ......-3.26713087846712
2326305.06715363 ......6.79832956499895 ......-3.35572740118132
3981071.70553497...... 6.59941778875662 ......-3.50204977064032
6812920.69057961 ......6.10718328006143...... -3.73075734041662
11659144.0117983 ......5.13927320828323 ......-4.04839453004176
19952623.1496888 ......3.82351328567971...... -4.42101649285181
34145488.738336 ...... 2.62807468084941 ......-4.80832034047117
58434141.3373518...... 1.83567026586748 ......-5.20125372342626
99999999.9999999 ......1.41059927338957 ......-5.58031981846252
The first column is the coordinates of ‘X’
The second column is the amplitude of the ‘Y’ coordinates of the bode
The third column is the phase of the ’ Y’ coordinates of the bode
How do I import these data and draw bode diagram with MATLAB and How to export MATLAB bode diagram data’s with this data format?
2 Comments
Azzi Abdelmalek
on 10 Sep 2012
import from what? text file? excel file?
Sunetra Sawant
on 20 Feb 2023
How to plot frequencies on x-axis, just like bode plots format?
Answers (1)
Azzi Abdelmalek
on 10 Sep 2012
Edited: Azzi Abdelmalek
on 10 Sep 2012
data=[10 0.0911222683470981 -1.58847081420007
17.1132830416178 0.155513705289354 -1.59826007442724
29.2864456462524 0.265372788697364 -1.61337362876168
50.1187233627272 0.452875507309409 -1.63924925736688
85.7695898590894 0.771380837522393 -1.6844579215245
146.779926762207 1.30422486175599 -1.76177744417405
251.188643150958 2.15885228954428 -1.88922949657677
429.866234708228 3.38909945622017 -2.08389456518048
735.642254459642 4.79331476991719 -2.33778424860481
1258.92541179417 5.90723048305756 -2.59657088827632
2154.43469003188 6.51210885390879 -2.80121801151038
3686.94506451958 6.76551329794937 -2.93773717631133
6309.57344480193 6.85906013908311 -3.02175637289138
10797.7516232771 6.89190068991012 -3.07200435455205
18478.4979742229 6.9032185997441 -3.10201666772075
31622.7766016838 6.90708374137897 -3.12039586346281
54116.9526546464 6.90836924161824 -3.13252146311361
92611.8728128794 6.90870360455884 -3.14196763982071
158489.319246112 6.90851104747202 -3.15152485034634
271227.257933203 6.90754724630841 -3.16401689981387
464158.883361278 6.90459064111762 -3.18312952818843
794328.234724283 6.8959080205459 -3.21447528466877
1359356.39087853 6.87065827244468 -3.26713087846712
2326305.06715363 6.79832956499895 -3.35572740118132
3981071.70553497 6.59941778875662 -3.50204977064032
6812920.69057961 6.10718328006143 -3.73075734041662
11659144.0117983 5.13927320828323 -4.04839453004176
19952623.1496888 3.82351328567971 -4.42101649285181
34145488.738336 2.62807468084941 -4.80832034047117
58434141.3373518 1.83567026586748 -5.20125372342626
99999999.9999999 1.41059927338957 -5.58031981846252]
% if your data are in excel file
data=xlsread('YourFileName.xls')
% to plot Bod diagram
f=log10(data(:,1));
gain=20*log(data(:,2));phase=data(:,3);
close;subplot(2,1,1);plot(f,gain);
xlabel('frequency log10(\omega)');ylabel('Gain(dB)');title('Amplitude')
subplot(2,1,2);plot(f,phase);
xlabel('frequency log10(\omega)');ylabel('Phase(rd)');title('Phase')
%to save your data
save filename data % to mat filename
xlswrite('filename.xls',data) % to excel file
dlmwrite('filename.txt',data,' ') % to text file
3 Comments
Janani Baskaran
on 2 Nov 2016
Hi! I have Frequency, Input Voltage and Output voltage on an excel sheet. can i import this into matlab and draw a Bode Plot?
Sunetra Sawant
on 20 Feb 2023
How to plot frequencies on x-axis, just like bode plots format?
bhawya b
on 4 Sep 2023
@Azzi Abdelmalek thanks for the remarkable code but may I know whats data? Does it contain both frequency and phase?
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