Create multi slopes from a profile
显示 更早的评论
Hello there,
Is there a possible way to create some slopes within a profile? My case: I have a profile containing some group of values separated by nans. My intention is how to create slopes for each group. So, since there are some groups in the profile, there will be some slopes which corresponds to each group.
Please find attached mat file for the data.
Cheers
采纳的回答
I am not certain what you want. This code performs a linear regression on the line clusters and then plots it for each of them.
Try this —
load('profiles_z_d.mat')
whos('-file', 'profiles_z_d.mat')
Q = [nnz(isnan(d_x1)) nnz(isnan(z))];
idx = ~isnan(d_x1);
startidx = strfind(idx, [0 1])+1;
stopidx = strfind(idx, [1 0]);
ssidx = [startidx; stopidx];
for k = 1:size(ssidx,2)
G{k,1} = d_x1(ssidx(1,k):ssidx(2,k));
G{k,2} = z(ssidx(1,k):ssidx(2,k));
B(:,k) = [G{k,1}; ones(size(G{k,1}))].' \ G{k,2}.';
end
% B
figure
plot(d_x1, z)
hold on
for k = 1:size(B,2)
rline = [G{k,1}; ones(size(G{k,1}))].' * B(:,k);
plot(G{k,1}, rline, '-r')
text(max(G{k,1})+0.1, max(rline), sprintf('y = %.2f \\cdotx% +.2f',B(:,k)), 'Horiz','left')
end
hold off
xlim([0 20])
title('All Data')
figure
plot(d_x1, z)
hold on
for k = 1:size(B,2)
rline = [G{k,1}; ones(size(G{k,1}))].' * B(:,k);
plot(G{k,1}, rline, '-r')
text(max(G{k,1})+0.1, max(rline), sprintf('y=%.2f\\cdotx%+.2f',B(:,k)), 'Horiz','left')
end
hold off
title('Selected Detail')
xlim([0 5])
ylim([390 415])
.
2 个评论
Adi Purwandana
2024-5-8
编辑：Adi Purwandana
2024-5-8
Star Strider
2024-5-8
As always, my pleasure!
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Creating, Deleting, and Querying Graphics Objects 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
