What is the origin of 'sleep tight'?

Read moreOne of the mysteries of the English language finally explained.

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A diagram in which the numerical values of variables are represented by the height or length of lines or rectangles of equal width.

*‘the bar chart shows sales on the left and cost of sales on the right’*-
*‘Yes, the numbers are the same, but it's much clearer in the bar graph that the left-hand bar represents less than twice as much as the right-hand one!’* -
*‘These are combined and shown both in actual numbers and as ratios in the bar graph.’* -
*‘Each bar graph represents the average from three independent cultures; error bars indicate the standard deviation.’* -
*‘For both line Y and line X the distribution of heteroplasmy levels, presented in bar chart form in Fig 1, was far from that predicted by the 200 segregating unit model.’* -
*‘The rates of transmission of the dominant markers from one generation to the next are illustrated in the bar graph and shown numerically below.’* -
*‘High-speed computers convert imagery into a bar graph that charts the pixels, dots of pure black to pure white and all of the grays.’* -
*‘The Importance Value Chart is a bar graph with each bar representing a specific system, subsystem, or component's contribution to the overall probability of an undesirable event.’* -
*‘The familiar horizontal bar chart was developed as a production control tool to provide a quick visual means of determining where and how a project was going, thereby simplifying project management and tracking.’* -
*‘Up until then, we were drafting simple bar chart schedules by hand.’* -
*‘The bar chart shows the number of deaths by different causes in the UK in 1998.’* -
*‘There were strange moving bitmapped colors and a model that looked like a 3 - D bar chart.’* -
*‘Both bull power and bear power are plotted as histograms under the bar chart of your chosen security.’* -
*‘White lines divided the monitor screen into quarters and a vertical bar chart appeared in each section.’* -
*‘As with the bar chart, the bars represent the relative size of each of the age bands.’* -
*‘Though he only had a few data points, he invented a curve, when only a bar graph could be used to represent such data.’* -
*‘A bar graph representing number or percentage of right-hand throws would show a vast difference between the two groups.’* -
*‘Indeed, an accompanying bar graph illustrated what many of us have suspected all along.’* -
*‘On page four for instance, a clear and simple bar chart shows the dramatic deterioration in the government's finances in recent years.’* -
*‘This concept is represented in a bar graph pictured in the students' workbooks.’* -
*‘In other news, I spent much of yesterday working on a bar graph representing two categories of convicts: Imprisoned and Imprisoned and Flogged.’* -
*‘The layout is confusing and they should have just used a bar chart, but my reading of this graph is that hardly anyone responded in the 0-4 range.’* -
*‘To conclude, we will be keeping a running total of our cumulative scores in the Contact column, and may even keep the natty little bar chart thing I've put there.’* -
*‘An exemplary representation is a bar graph having the temperature of one thermal sensor at one end and the temperature of another thermal sensor at the other end.’* -
*‘Below the numerical values for each example are bar graph representations of the data.’* -
*‘The number of counts and measurements for any character usually exceeded 30, and the frequency bar graph associated with this sample number always produced a normal curve.’* -
*‘If we rotate Figure 1 over time, it becomes the familiar bar chart, with each bar representing the range of prices for the specified period.’* -
*‘The Privacy Threat Index mimics the Homeland Security bar chart with green, blue, yellow, orange and red signaling low, guarded, elevated, high and severe threat conditions, respectively.’* -
*‘We begin with a simple weekly bar chart of the S & P 500.’*

View synonyms**graph**, table, tabulation, grid, histogram, diagram, guide, scheme, figure, illustration-