Plotting a sum with a variable

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Dimitri
Dimitri 2014-5-3
编辑： Dimitri 2014-5-3
Hi everyone. I would like to plot something of the form:
sum( (factorial(k) / (factorial(i)*factorial(k-i)), i=1..k)
for different values of k, say, for k=1,2,..,10 in a single graph.
Does anyone know the syntax how to do that? I greatly appreciate your answers! Thanks! D

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采纳的回答

Jos (10584)
Jos (10584) 2014-5-3
Creat a function and use arrayfun:
fh = @(k) sum(factorial(k) ./ factorial(1:k) .* factorial(k-(1:k))) % function handle
x = 1:5
y = arrayfun(fh, x) % apply function to a list of values
plot(x, y ,'bo-')

更多回答（1 个）

Dimitri
Dimitri 2014-5-3
编辑：Dimitri 2014-5-3
Thank Jos, everything makes sense now!

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