# How do you find the maximum area of a rectangle?

## How do you find the maximum area of a rectangle?

A rectangle will have the maximum possible area for a given perimeter when all the sides are the same length. Since every rectangle has four sides, if you know the perimeter, divide it by four to find the length of each side. Then find the area by multiplying the length times the width.

## How do you find the area under a histogram?

Then, derive the frequency density for each interval by dividing the frequency by the corresponding class width. Finally, the area for the histogram equation is calculated by adding the product of all the frequency density and their corresponding class width.

What is represented area of rectangle in histogram?

In a histogram, the area of the rectangle is proportional to its frequency, we can say that the lengths of the rectangles are proportional to the frequencies. In a histogram, the shape of rectangles shows how different sets of data are represented as per the class intervals and frequency.

### What is histogram Geeksforgeeks?

A Histogram is a variation of a bar chart in which data values are grouped together and put into different classes. This grouping enables you to see how frequently data in each class occur in the dataset. The histogram graphically shows the following: Frequency of different data points in the dataset.

### How do you find the maximum area of a histogram?

Following is the complete algorithm.

1. Create an empty stack.
2. Start from first bar, and do following for every bar ‘hist[i]’ where ‘i’ varies from 0 to n-1. ……
3. If the stack is not empty, then one by one remove all bars from stack and do step 2. b for every removed bar.

How do you find the largest rectangle in a histogram?

## What is the height of a rectangle in histogram?

The height of a rectangle in a histogram shows the number of time the particular observation occurred in the data that is frequency. Hence, the height of a rectangle in a histogram shows the Frequency of the class.

## Why do we need histogram equalization?

Histogram Equalization is a computer image processing technique used to improve contrast in images. This method usually increases the global contrast of images when its usable data is represented by close contrast values. This allows for areas of lower local contrast to gain a higher contrast.

How to find the largest rectangular area in a histogram?

Find the largest rectangular area possible in a given histogram where the largest rectangle can be made of a number of contiguous bars. For simplicity, assume that all bars have same width and the width is 1 unit. For example, consider the following histogram with 7 bars of heights {6, 2, 5, 4, 5, 1, 6}.

### How do you find the maximal rectangle in Excel?

To find the maximal rectangle, if for every bar x, we know the first smaller bar on its each side, let’s say l and r, we are certain that height [x] * (r – l – 1) is the best shot we can get by using height of bar x. In the figure below, 1 and 2 are the first smaller of 5.

### How to calculate the area of a rectangle?

Calculate area of rectangle with hist [tp] as smallest bar. For hist [tp], the ‘left index’ is previous (previous to tp) item in stack and ‘right index’ is ‘i’ (current index). 3) If the stack is not empty, then one by one remove all bars from stack and do step 2.b for every removed bar.

How to count the number of consecutive same height or higher bars?

To count the number of consecutive same-height-or-higher bars on the immediate left of bar [i], we only need to find the closest bar on the left that is shorter than the bar [i], because all the bars between this bar and bar [i] will be consecutive same-height-or-higher bars.