概率分布matlab

dangdai

请教一下，结果是个向量，在MATLAB中怎么自然画出DATA的概率分布图（要曲线）。。在MATLAB中用过些函数，但都不太理想，谢谢

GSM

没看明白.

曲线只能表示标量的分布啊.

dangdai

I wanna plot x axis is value from vector, y axis is probability value..danke

GSM

dangdai 发表于 2011-10-10 09:06
I wanna plot x axis is value from vector, y axis is probability value..danke

"value from vector" ???

dangdai

for example, I get results saved as a vector,like x=[1.01 1.02 1.01..........].
I need plot the probability distribution curve with x-axis( vector value) and y-axis( probability value). I know there are lots of options.

ottorzx

x=[1.01 1.02 1.01..........]
y=[0.1 0.5 0.3 0.4..........]
plot(x,y)

dangdai

????,,thanks..i have no corresponding probability vector

ottorzx

dangdai 发表于 2011-10-10 11:41
????,,thanks..i have no corresponding probability vector

wie hast du die Wahrscheinlichkeit jedes Wertes in x=[1.01 1.02 1.01..........] bestimmt?

two steps

一定要用matlab么？
单纯画图我觉得gnuplot很好

GSM

dangdai 发表于 2011-10-10 10:45
for example, I get results saved as a vector,like x=[1.01 1.02 1.01..........].
I need plot the pro ...

你这里的x不是向量.

画分布可以用直方图函数hist(x(:), nbins),
nbins选一个大小合适的整数.

如果你需要光滑的曲线, 可以用mixture of Gaussians或者其他函数去匹配.

johndoe

this is not probability, you are talking about histogram.....

you do not have the population, but only the sample.....

ericmm

Use "toolboxes" in matlab, in statistics, use distribution fitting tool.

Gnaixil

ksdensity 这个函数可以画连续的概率分布 就不是hist那样的柱状图了