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

please help me, I=I need the grow population like 36m, 37, 38,.. on plot

Answer 1

[John D'Errico]

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?

[Ghazi]

You are close to the solution. Please help me. I have one variable, which is the total population, and it is estimated at P_0 = 36,408,820 million. Using an equation, I want to predict the population after 50 years.

[Walter Roberson]

@Ghazi

That sounds like a different question compared to asking how to label plots?

[Ghazi]

thank you bro

[John D'Errico]

@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.

Answer 2

[Walter Roberson]

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)))

[Ghazi]

thank you bro