plotting values greater than threshold
103 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
shobhit mehrotra
le 12 Août 2014
Commenté : ishbish
le 19 Fév 2018
im trying to plot values greater than a threshold in a different color. for example i want to plot values greater than 100 in the image in red
0 commentaires
Réponse acceptée
Image Analyst
le 12 Août 2014
% Create sample data.
y = randi(160, 1, 40); % Array of random numbers
x = 1 : length(y);
% Plot everything with blue spots and blue lines between them.
plot(x, y, 'bo-', 'LineWidth', 2, 'MarkerSize', 7);
grid on;
% Now define a threshold.
threshold = 100;
moreThanThreshold = y > 100; % Logical indexes.
% Extract those over the threshold into new arrays.
over_x = x(moreThanThreshold);
over_y = y(moreThanThreshold);
% Now plot those over 100 with red stars over the first set of points.
hold on; % Important so you don't blow the first plot away.
plot(over_x, over_y, 'r*', 'LineWidth', 2, 'MarkerSize', 13);
3 commentaires
Image Analyst
le 12 Fév 2018
Start a new question and attach some actual data, and if possible a picture of what you'd like to see.
ishbish
le 19 Fév 2018
I ultimately decided to apply a rotation matrix to my data and then just do it as described above, much easier! Thank you for the advice though.
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Lighting, Transparency, and Shading dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!