OmicShare Tools - 基迪奥生信云工具

Volcano plot

Project ID：

Upload a file： *

Select a file Example

Chart title：

point size：

x label：

y label：

Column for x axis: *

Threshold of x axis：

(threshold of fold change)

Column for y axis: *

Threshold of y axis：

(threshold of P value or Q value)

xmax：

(maximum number of x axis, optional)

ymax：

(maximum number of y axis, optional)

Color：

The color of the nodiff：

The color of the up：

The color of the down：

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Instructions
Example

Function：
A type of scatter plot that displays significant difference between two groups of data. The x axis is the log2 of the fold change between two groups, and the y axis is the negative log2 of P value or Q value. By coloring significantly different points from other points, one can recognize the significant difference between two groups of data.

Input：

Upload a tab delimited text file with headers. If your data is not TAB delimited, you can use Excel to convert it.

Parameters：

①Column for x axis: column for log2(FC).

②Column for y axis: column for P value or Q value.

③Threshold of x axis: threshold of fold change. Usually 2 or 1.5.

④Threshold of y axis: threshold of P value or Q value. Usually 0.05 or 0.01.

Output：
A volcano plot in PNG/PDF format.

Example：

Volcano plot input file

Output：

In the task interface, click on the “download” button to download volcano plot results in PNG and PDF format.