How to use mod function in this question

Question

Ketul Patel 2017-9-13

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https://ww2.mathworks.cn/matlabcentral/answers/356477-how-to-use-mod-function-in-this-question

评论： Ketul Patel 2017-9-13

Hi, the question follows as: bacterial growth in lab follows, N = No*exp(k*t), where the value of k = 1.03454, how do we solve it for 24 hours of time, and plot the number of bacteria at the interval of 2 hours. I tried this script, but can't do further as for loop with mod condition is giving an error, whereas other loops are sometimes producing only points in the graph.

k  = 1.034548030686485;
No = 1;
clf
for t = [1:24]
   N(t) = No* exp(k*t)
end

I read online that while calling that function I might be doing one at a time or something similar. Could anyone please explain? Thanks

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Answer 1

Christoph F. 2017-9-13

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https://ww2.mathworks.cn/matlabcentral/answers/356477-how-to-use-mod-function-in-this-question#answer_281366

在 MATLAB Online 中打开

        t=1:24;
        N=No*exp(k*t);
        plot(t(1:2:end), N(1:2:end), 'kx-');

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Ketul Patel 2017-9-13

Hi, Thanks for the answer, it solved the problem, but is there anyway i could do that with using mod function? Like, After doing the syntax i used before, T = 1:24; If mod(t, 2)==0 Plot(N,t) End

Or Somewhat similar?

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