---
name: "Bio::Expression::FeatureI"
section: "3pm"
platform: "linux"
package: "bioperl"
version: "1.6.1-2"
release: "Debian 6.0 (Squeeze)"
platforms: ["linux"]
url: "https://new.carta.tech/Bio::Expression::FeatureI"
---

# Bio::Expression::FeatureI(3pm)

an interface class for DNA/RNA features

## NAME

Bio::Expression::FeatureI - an interface class for DNA/RNA features

## SYNOPSIS

Do not use this module directly

## DESCRIPTION

This provides a standard bioperl interface class for representing DNA and RNA features.  It cannot be instantiated directly, but serves as an abstract base class for implementors.

## FEEDBACK

### Mailing Lists

User feedback is an integral part of the evolution of this and other Bioperl modules. Send your comments and suggestions preferably to one of the Bioperl mailing lists.  Your participation is much appreciated.

```
  bioperl-l@bioperl.org                  - General discussion
  http://bioperl.org/wiki/Mailing_lists  - About the mailing lists
```

### Support

Please direct usage questions or support issues to the mailing list:

*bioperl-l@bioperl.org*

rather than to the module maintainer directly. Many experienced and  reponsive experts will be able look at the problem and quickly  address it. Please include a thorough description of the problem  with code and data examples if at all possible.

### Reporting Bugs

Report bugs to the Bioperl bug tracking system to help us keep track the bugs and their resolution.  Bug reports can be submitted via the web:

```
  http://bugzilla.open-bio.org/
```

## AUTHOR

Allen Day \<allenday@ucla.edu\>

## APPENDIX

The rest of the documentation details each of the object methods. Internal methods are usually preceded with a \_

### *quantitation()*

```
  Title   : value
  Usage   : $val = $ftr->quantitation()
  Function: get/set the feature's quantitation
  Returns : A numeric value
  Args    : a new numeric value (optional)
```

### *quantitation\_units()*

```
  Title   : quantitation_units
  Usage   : $units = $ftr->quantitation_units()
  Function: get/set the units of the feature's quantitation
  Returns : A string or undef
  Args    : a new string (optional)
```

### *standard\_deviation()*

```
  Title   : standard_deviation
  Usage   : $std_dev = $ftr->standard_deviation()
  Function: get/set the feature's standard deviation of quantitation()
  Returns : A numeric value
  Args    : a new numeric value (optional)
  Comments: no calculation is done here
```

### *sample\_count()*

```
  Title   : sample_count
  Usage   : $sample_count = $ftr->sample_count()
  Function: get/set the number of samples used to calculate
            quantitation()
  Returns : An integer
  Args    : a new integer (optional)
```