# How to highlight a moving data point

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Hans123 on 11 Apr 2019
Commented: Hans123 on 17 Apr 2019
Hi,
I have an animated plot, the dynamic graph is a mathermatical model based on the 2 points on the other static graph. The 2 points are - one that is fixed at the start of the static graph, the other is a moving point that moves as k (loop control variable) increases. I want to highlight these two points to improve my graph. Below I have pasted a still of my graph and what I am trying to achieve and my code.
Hope my question is clear, any help is really appreciated.
%best fit calculations
y1 = Mean(1);
x1 = Mean_step(1);
y2 = max_cap./10;
x2 = 0;
aaa = (x1*y1)+(y1)*(-x1*y1)/(y1-y2);
bbb = (x2*y2-x1*y1)/(y1-y2);
dist = 0:1/3:1600;
model = aaa./(dist + bbb);
legend('Coarse Approach','Fine Approach','Best Fit Line')
hp = plot(dist, model, 'r-', 'Linewidth', 1.5);
txt1 = ['V_{preamp} = ' num2str(aaa) ' / (Tool-Substrate Gap + (' num2str(bbb) '))'];
ht = text(580, 700, txt1, 'FontSize', 9);
for k = 2:352
y2=Mean(k);
x2=Mean(k);
aaa=(x1*y1)+(y1)*(x2*y2-x1*y1)/(y1-y2);
bbb=(x2*y2-x1*y1)/(y1-y2);
model = aaa./(dist + bbb);
hp.YData = model;
txt1 = ['V_{preamp} = ' num2str(aaa) ' / (Tool-Substrate Gap + (' num2str(bbb) '))'];
ht.String = txt1;
drawnow()
end
##### 2 CommentsShowHide 1 older comment
Hans123 on 11 Apr 2019
Just the current value highlighted.

Walter Roberson on 12 Apr 2019
Before the loop,
h = plot(nan, nan, 'yo', 'MarkerSize', 20, 'MarkerFaceColor, 'y'); %yellow, filled, large
Inside the loop,
set(h, 'XData', x_of_position_to_highlight, 'YData', y_of_position_to_highlight);
Hans123 on 17 Apr 2019
you have no idea how much I appreciate your help!!!
Thank you

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