What is the main difference between probability density function (PDF) and histogram? A: The calculation methods for histogram and PDF are different B: The values on histogram curve are larger than the values on PDF curve C: The shapes of histogram curve and PDF curve are different D: The integration of the PDF curve equals 1, the step of ordinate axis in the histogram is 1

The difference between a histogram and a frequency polygon is: A: the frequency polygon is reported as a percent, a histogram does not report percents. B: the histogram shows frequencies while a frequency polygon shows cumulative frequencies. C: the bars in a histogram and a frequency polygon cannot be adjacent. D: open-ended classes can be accommodated with a frequency polygon.

The difference between a histogram and a frequency polygon is:

The total area of the bars in a relative frequency histogram:

Histogram equalization can be used to enhance the contrast of an image.

histogram具有针对原始数据进行同时汇总和绘图的作用，运行下面代码： x = randn(1000,1); nbins = 25; h = histogram(x,nbins); 则在命令行窗口查看组别情况，可以输入

histogram具有针对原始数据进行同时汇总和绘图的作用，运行下面代码： x = randn(1000,1); nbins = 25; h = histogram(x,nbins); 则在命令行窗口查看分组频数情况，可以输入

MATLAB中绘制直方图的函数是( ) A: pie B: a C: histogram D: pareto

The total area of the six bars in a relative frequency histogram for which the width of each bar is five units is 1.

MATLAB中绘制直方图的函数是( ) A: pie B: bar C: histogram D: pareto