Repeating arrow in plot
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Hi so im trying to plot those graphs but i get the arrows from the previous graph, how can i get rid of them?
Filter=sgolayfilt(new_data,3,31); % filter for smoothing the signal's noise.
%----PLOTTING---
subplot(212);
plot(NewTime,Filter);
subplot(211);
plot(NewTime,new_data,'b');
subplot(211);
grid on
xticks(0:3:15);
set(gca,'FontSize',12,'FontName','Ariel');
title("Interpulated data");
xlabel("Time [sec]");
ylabel("Acceleration [m/sec^2]");
subplot(212);
grid on
xticks(0:3:15);
set(gca,'FontSize',12,'FontName','Ariel');
title("Filtered signal");
xlabel("Time [sec]");
ylabel("Acceleration [m/sec^2]");
annotation("arrow", [0.2775 0.2988], [0.419 0.372])
annotation("arrow", [0.1787 0.1575], [0.437 0.39])
annotation("arrow", [0.8638 0.8775], [0.179 0.24])
%% section break
FrequencyDomain1=fftshift(fft(new_data)); % Transforming the interpulated data to frequency domain and creating it symmetrical aroud zero by phase shiffting.
Amplitude1=abs(FrequencyDomain1); % the data is complex and we want the "size" of the data at each point so we use absolute value to find the amplitude.
n1 = length(new_data);
FrequencyDomain2=fftshift(fft(Filter)); % Transforming the filtered data to frequency domain and creating it symmetrical aroud zero by phase shiffting.
Amplitude2=abs(FrequencyDomain2); % the data is complex and we want the "size" of the data at each point so we use absolute value to find the amplitude.
n2 = length(Filter);
fs=100; % sampling rate [Hz].
fshift1 = (-n1/2:n1/2-1)*(fs/n1); % Creating the frequency axis in order to ensure that each data point match the correct frequency.
fshift2 = (-n2/2:n2/2-1)*(fs/n2);
%---PLOTTING---
subplot(211);
plot(fshift1,Amplitude1);
subplot(212)
plot(fshift2,Amplitude2,'Marker', 'none');
subplot(211);
grid on
xticks(-50:10:50);
set(gca,'FontSize',12,'FontName','Ariel');
title("Frequency domain before filterring");
xlabel("Frequency [Hz]");
ylabel("Amplitude");
xlim([-14.9 14.0]);
ylim([-77 4268]);
subplot(212)
grid on
xticks(-50:10:50);
set(gca,'FontSize',12,'FontName','Ariel');
title("Frequency domain after filterring");
xlabel("Frequency [Hz]");
ylabel("Amplitude");
xlim([-14.9 14.0]);
ylim([-77 4268]);
hold off
回答（1 个）
Voss
2022-12-22
Store the annotations in a variable:
annot = [ ...
annotation("arrow", [0.2775 0.2988], [0.419 0.372])
annotation("arrow", [0.1787 0.1575], [0.437 0.39])
annotation("arrow", [0.8638 0.8775], [0.179 0.24])
];
Then when you want to get rid of them, delete them:
delete(annot);
Or maybe don't create them in the first place?
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2022-12-21
2022-12-22
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