dangdai 发表于 2011-10-9 17:12

概率分布matlab

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 发表于 2011-10-10 01:10

没看明白.

曲线只能表示标量的分布啊.

dangdai 发表于 2011-10-10 09:06

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

GSM 发表于 2011-10-10 10:31

dangdai 发表于 2011-10-10 09:06 static/image/common/back.gif
I wanna plot x axis is value from vector, y axis is probability value..danke

"value from vector" ???

dangdai 发表于 2011-10-10 10:45

for example, I get results saved as a vector,like x=.
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 发表于 2011-10-10 11:23

x=
y=
plot(x,y)

dangdai 发表于 2011-10-10 11:41

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

ottorzx 发表于 2011-10-10 11:54

dangdai 发表于 2011-10-10 11:41 static/image/common/back.gif
????,,thanks..i have no corresponding probability vector

wie hast du die Wahrscheinlichkeit jedes Wertes in x= bestimmt?

two steps 发表于 2011-10-10 14:09

一定要用matlab么？
单纯画图我觉得gnuplot很好

GSM 发表于 2011-10-10 14:46

dangdai 发表于 2011-10-10 10:45 static/image/common/back.gif
for example, I get results saved as a vector,like x=.
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 发表于 2011-10-10 14:48

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

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

ericmm 发表于 2011-11-2 18:00

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

Gnaixil 发表于 2011-11-6 09:57

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
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