Line and scattered data on one plot

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Daniel
Daniel 2016-2-17
回答： Walter Roberson 2016-2-17
I have three polynomials,
y_150 = @(x) 22*((x-23)/4.9)^4 - 48*((x-23)/4.9)^3 + 27*((x-23)/4.9)^2 - 37*((x-23)/4.9) + 40;
y_200 = @(x) 11*((x-19)/4.8)^4 - 48*((x-19)/4.8)^3 + 73*((x-19)/4.8)^2 - 72*((x-19)/4.8) + 48;
y_212 = @(x) 23*((x-19)/4.8)^4 - 43*((x-19)/4.8)^3 + 22*((x-19)/4.8)^2 - 40*((x-19)/4.8) + 41;
Which I plot using ,
for i = 9:1:25
n = n + 1;
y_15(n) = y_150(i);
y_20(n) = y_200(i);
y_21(n) = y_212(i);
end
figure;
plot(9:1:25,y_15)
hold on
plot(9:1:25,y_20)
hold on
plot(9:1:25,y_21)
But, now I use these curves to calculate certain events. eg,
life_log{event_log} = [n_yaw(i,2) y_150(n_yaw(i,2))];
I then end up with a cell array,
life_log = [9,1041] [12,506] [12,506] [12,506] [15,191] [15,191] [15,191] [15,191] [21,63] [9,1041] [9,1041] [9,1041];
Which I then transform into a matrix,
life = cell2mat(life_log');
So... My question is how do I plot these scattered points on the same graph of the curves?

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采纳的回答

Walter Roberson
Walter Roberson 2016-2-17
You already have "hold on" in effect, so just
scatter(life(:,1), life(:,2))

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