﻿ Example 13. Graphs

# Example 13. Graphs

DolphinDB supports various chart types, such as line, pie, column, bar and scatter.

We can use function plot for basic graphing. The system supports various chart types, such as line, pie, column, bar and scatter.

The syntax of function plot is

plot(input data[, labels[, titles[, chartType]]])

We can use a vector, tuple, matrix, or table as the input data.

Line chart 1: plot a table

x=0.1*(1..100)

y=0.1*(100..1)

t=table(x,y)

plot(t) the graph above can also be generated by plot(t[`x`y]).

Line chart 2: plot a matrix

plot([sin,cos](x),x,"cos and sin curve") note that function names are used as series names, and we specify data labels and the graph title.

Line chart 3: plot a vector

plot(cumsum(x) as cumsumX, 2012.10.01+1..100, "cumulative sum of x") cumsumX is used as the series name

Line chart 4: plot a tuple

plot([1..10 as x, 10..1 as y], 1..10) x and y are used as the series names

Example 5: plot a bar graph

plot(1..5 as value, `IBM`MSFT`GOOG`XOM`C, `rank, BAR) Example 6: plot a column graph

plot(99 128 196 210 312 as sales, `IBM`MSFT`GOOG`XOM`C, `sales, COLUMN) Example 7: plot a pie graph

plot(99 128 196 210 312 as sales, `IBM`MSFT`GOOG`XOM`C, `sales, PIE) Example 8: scatter plot

x=rand(1.0, 1000);

y=x+norm(0.0:0.2, 1000);

plot(x, y, ,SCATTER) 