フィルターのクリア

Error in the plot function/low resolution

3 ビュー (過去 30 日間)
Pedro Valadao
Pedro Valadao 2021 年 2 月 5 日
回答済み: Pedro Valadao 2021 年 2 月 9 日
Hi everyone!
I have an EMG signal at 1000Hz. When I use the plot(EMG signal), the x values only move at 10 ms (anything inside this gets the same x value), the y values are working fine (upper pic). If I cut the signal to a smaller piece, the error is gone (lower pic). I need the 1ms resolution to define events.

採用された回答

Pedro Valadao
Pedro Valadao 2021 年 2 月 9 日
Hi all,
It is not an error. It is just the precision of the datatip function. It is easily adjustable on the following line:
formattedValue = [valueFormat num2str(value,4) removeValueFormat];
i found this info on the following discussion:
Cheers!
Pedro.

その他の回答 (2 件)

Maximilian Schönau
Maximilian Schönau 2021 年 2 月 5 日
Hi, it is hard to find (and fully understand) your problem without having your code.
If I understand your question right, you want to be your upper plot in a better resolution. Since you have the data probably available in a better resolution (second plot), I would guess that some function deletes some values on the way, it could be for example the function linspace(x1,x2,resolution) which does this to your data.

Pedro Valadao
Pedro Valadao 2021 年 2 月 5 日
Hi Max,
Thank you for the quick reply! The same error occurs with the following code:
v = rand(1,150000),plot(v) % here the error happens as in the upper figure
figure, plot v(1:200) % here the error does not happen as in the lower figure
I have checked multiple files with the same type of data, .mlx and .m - the same problem happens consistently.
Br, P.
  4 件のコメント
Pedro Valadao
Pedro Valadao 2021 年 2 月 5 日
Hi, I'm using matlab R2020a installed on my pc.
v = rand(1,150000)
figure, subplot(2,1,1), plot(v), subplot(2,1,2), plot(v(1:200))
If I zoom both a lot and use the data tips, the following happens:
Pedro Valadao
Pedro Valadao 2021 年 2 月 8 日
sorry if this is too much of a newby question, I'm tagging you because you have answered pretty much all questions I have seen in this forum! haha
Could you please help?
Br, Pedro.

サインインしてコメントする。

カテゴリ

Help Center および File ExchangeBartlett についてさらに検索

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by