change of variable

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Baba
Baba 2011-11-3
I asked this question before but I missed an important point:
I would like to be able to Change 'X7' . I don't want to Do anything with the "X" because I have Y7, Z7,K7 in other plots. Basically I just want to be able to change the digit "7" and not the letters.
Here is my code:
subplot(3,2,1)
Hs=spectrum.periodogram;
psdest = psd(Hs,X7,'Fs',Fs);
semilogx(psdest.Frequencies,10*log10(psdest.Data));
grid on;
xlabel('Frequency (Hz)')
ylabel('dB/Hz')
title('X7')
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Fangjun Jiang
Fangjun Jiang 2011-11-3
If you read the answers to your previous same question, both answers provide valid solution.
Walter Roberson
Walter Roberson 2011-11-3
The previous answers were at http://www.mathworks.com/matlabcentral/answers/20170-change-variable-name

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采纳的回答

Walter Roberson
Walter Roberson 2011-11-3
Perhaps the answer being looked for here is a variation of Fangjun's earlier answer.
N = 7;
Str = sprintf('X%d', N);
psdest = psd(Hs,eval(Str),'Fs',Fs);
title(Str);

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