Why does my plot not display?

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Alex Strongholm
Alex Strongholm 2015-1-15
编辑： GMW 2017-5-8
I have this function:
function savings
salary=input('Positive number')
while salary<0
soldata=input('Positive number, please')
end
daily_spending=input('Negative number')
while daily_spending>0
daily_spending=input('Negative number, please')
end
savings=salary;
days=1;|
day_counter=1;
months=1;
while months<=12
savings=savings+daily_spending;
if days==30;
months=months+1;
savings=savings+salary;
days=0;
end
day_counter=day_counter+1;
days=days+1;
plot(day_counter, savings);
pause(0.05)
end
The problem I have is that when matlab starts plotting, it shows up the figure but not the line. Why is that? I can't figure it out. Could someone help me? This is what it looks like:
PD: Axes refresh well
  1 个评论
GMW
GMW 2017-5-8
编辑：GMW 2017-5-8
You are missing a 'hold'
Try: hold on, plot(day_counter, savings, '.')

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回答（2 个）

David Young
David Young 2015-1-15
The problem is that both day_counter and savings are scalars, so there is nothing to plot. I suspect that what you need is to store successive values in an array, and plot the array.
Adam
Adam 2015-1-15
Both day_counter and savings are scalars so it just plots a single point.

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