I want show population on plot like 36M, 37M....

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Ghazi
Ghazi 2024-6-17
评论： John D'Errico 2024-6-18
please help me, I=I need the grow population like 36m, 37, 38,.. on plot

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John D'Errico
John D'Errico 2024-6-17
编辑：John D'Errico 2024-6-17
Ran in:
You want the plot to plot each point as a string like 36M, 38M, etc?
Why not just divide by 1e6, then use the axis label to indicate millions?
P = [3.6e7, 3.8e7, 4.1e7, 4.5e7, 5.0e7]; % just making up some numbers
t = 1970:10:2010;
plot(t,P/1e6,'-o')
xlabel Years
ylabel 'Population in Millions'
Could you plot the points as text strings? Well, yes. Easily enough, using the function text. But seriously, why?
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John D'Errico
John D'Errico 2024-6-18
@Ghazi
You are now asking a completely different question. But that is also clearly a homework assignment, and I last had any desire to do homework at least 35 years ago. Probably longer than that, but I'm not going to count.
So look at your class notes. Read your text. Think about how you would formulate an exponential growth model.

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Walter Roberson
Walter Roberson 2024-6-18
移动：Walter Roberson 2024-6-18
Ran in:
Alternate solution:
P = [3.6e7, 3.8e7, 4.1e7, 4.5e7, 5.0e7]; % just making up some numbers
t = 1970:10:2010;
ax = gca;
plot(ax, t,P,'-o')
xlabel(ax, 'Years')
ylabel(ax, 'Population in Millions')
yticklabels(ax, compose("%gM", floor(ax.YTick/1e6)))

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