id stringlengths 15 54 | text stringlengths 3 133k | title stringclasses 1
value |
|---|---|---|
ros_instantiate/pythonapirosbagwrite_27.txt | add a comment | |
ros_instantiate/pythonapirosbagwrite_67.txt | [ Publish to topic from file ](/question/221828/publish-to-topic-from-file/) | |
ros_instantiate/pythonapirosbagwrite_9.txt | Python API rosbag write custom message | |
ros_instantiate/readmessageshtml_1.txt | Toggle Main Navigation | |
ros_instantiate/reading20msgs20from2_44.txt | 1. Download and install [ `ros_readbag.py` ](https://github.com/ElectricRCAircraftGuy/eRCaGuy_dotfiles/blob/master/useful_scripts/ros_readbagfile.py) using these commands. Be sure to read the comments in the top of the file for the latest information on installation instructions and python dependencies.
... | |
ros_instantiate/Commandline_136.txt | ` m ` | |
ros_instantiate/reading20msgs20from2_72.txt | # Why use `ros_readbagfile` for this purpose instead of `rostopic echo -b`? | |
ros_instantiate/readmessageshtml_6.txt | * [ Get MATLAB ](https://login.mathworks.com/embedded-login/landing.html?cid=getmatlab&s_tid=gn_getml) | |
ros_instantiate/reading20msgs20from2_62.txt |
time rg 'key: "piksi_' topics.yaml | sort -V | awk '!seen[$0]++' | |
ros_instantiate/readmessageshtml_8.txt | Search Help Center | |
ros_instantiate/Commandline_50.txt | * Prepend PREFIX to beginning of bag name before date stamp.
$ rosbag record -o session1 /chatter | |
ros_instantiate/Commandline_117.txt | * Show the usage and exit.
$ rosbag check -h | |
ros_instantiate/pythonapirosbagwrite_32.txt | [ tryan ](/users/33908/tryan/)
1421 ● 96 ● 26 | |
ros_instantiate/pythonapirosbagwrite_78.txt | [ none ](/questions/scope:all/sort:activity-desc/tags:none/page:1/) × | |
ros_instantiate/pythonapirosbagwrite_12.txt | * [ rosbag ](/questions/scope:all/sort:activity-desc/tags:rosbag/page:1/) | |
ros_instantiate/pythonapirosbagwrite_21.txt | [ edit ](/questions/374115/edit/) [ retag ](/s/questions/374115/retag/) flag
offensive [ close ](/questions/374115/close/) merge delete | |
ros_instantiate/readmessageshtml_33.txt | ` msgs = readMessages( ___ ,"DataFormat",Format) ` | |
ros_instantiate/reading20msgs20from2_42.txt | Source: [ this material was adapted from instructions first published in this
document here
](https://github.com/ElectricRCAircraftGuy/eRCaGuy_dotfiles/blob/master/git%20%26%20Linux%20cmds%2C%20help%2C%20tips%20%26%20tricks%20-%20Gabriel.txt)
, and [ the Python script is from here: ros_readbag.py
](https://github.com/E... | |
ros_instantiate/reading20msgs20from2_22.txt | 1. You need to know the _exact_ topic names you'd like to read from the bag file. So, let's see what's in the bag file. In any terminal, manually inspect all published topics and how many messages were published to each topic with this command:
time rosbag info demo.bag
# OR (if you know part of t... | |
ros_instantiate/reading20msgs20from2_58.txt | _Note that the following examples require the ripgrep (` rg ` ) command, which
is like ` grep ` only waaay faster. See here: [
https://github.com/BurntSushi/ripgrep#installation
](https://github.com/BurntSushi/ripgrep#installation) . Install ripgrep ( ` rg
` ) with: | |
ros_instantiate/Commandline_105.txt | * ` -k ` , ` --keep-alive `
* Keep alive past end of bag (useful for publishing latched topics).
$ rosbag play -k recorded1.bag | |
ros_instantiate/Commandline_76.txt | To output a machine-readable representation, use ` --yaml ` . See the [
cookbook ](/rosbag/Cookbook#get_summary_information) for an example of how to
load this representation in code. | |
ros_instantiate/Commandline_184.txt | ` -f ` , ` --force ` | |
ros_instantiate/Commandline_172.txt | ` -f ` , ` --force ` | |
ros_instantiate/Commandline_190.txt | * * * | |
ros_instantiate/reading20msgs20from2_43.txt | Note: you can kill any running processes. No ` roscore ` , for instance, is
required. | |
ros_instantiate/readmessageshtml_59.txt | Select a specific topic. | |
ros_instantiate/Commandline_17.txt | **IMPORTANT:** This wiki page quickly goes out-of-date. To ensure you are
fully aware of all command-line options available in your version of ROS,
simply run ` rosbag -h ` to see what subcommands are available for the `
rosbag ` command, then run ` rosbag <subcommand> -h ` to see what options are
available for a given... | |
ros_instantiate/reading20msgs20from2_33.txt |
$ rostopic echo /diagnostics_agg | tee topic2.yaml
WARNING: topic [/diagnostics_agg] does not appear to be published yet | |
ros_instantiate/readmessageshtml_64.txt | Use ` cellfun ` to extract all the ` X ` and ` Y ` fields from the structure.
These fields represent the _xy_ positions of the robot during the rosbag
recording. | |
ros_instantiate/Commandline_2.txt | The ROS Wiki is for ROS 1. Are you using ROS 2 ( [ Humble
](http://docs.ros.org/en/humble/) , [ Iron ](http://docs.ros.org/en/iron/) ,
or [ Rolling ](http://docs.ros.org/en/rolling/) )?
[ Check out the ROS 2 Project Documentation ](http://docs.ros.org)
Package specific documentation can be found on [ index.ros.org
... | |
ros_instantiate/Commandline_134.txt | The Python expression can access any of the Python builtins plus: | |
ros_instantiate/reading20msgs20from2_47.txt | 3. Now use ` ros_readbagfile ` . The general format is:
# read these topics and print them to stdout
time ros_readbagfile <mybagfile.bag> [topic1] [topic2] [topic3] [...]
# Write to the topics.yaml file withOUT also printing to stdout
time ros_readbagfile <mybagfile.bag> [topic1] [topic... | |
ros_instantiate/readmessageshtml_122.txt | * [ Trial Software ](/campaigns/products/trials.html?prodcode=RR&s_tid=doc_trial_RR_tb)
* [ Trial Software ](/campaigns/products/trials.html?prodcode=RR&s_tid=doc_trial_RR_tb)
* [ Product Updates ](/support/web_downloads_bounce.html?s_tid=hc_prod_update&s_cid=1008_degr_docdn_270055)
* [ Product Updates ](/suppo... | |
ros_instantiate/Commandline_149.txt | ` rosbag compress ` is a command-line tool for compressing bag files. | |
ros_instantiate/readmessageshtml_110.txt | * [ 中国 (简体中文) ](https://ww2.mathworks.cn)
* [ 中国 (English) ](https://ww2.mathworks.cn) | |
ros_instantiate/reading20msgs20from2_61.txt | Let's say you want to find a list of all key entries which begin with
"piksi_". You can do so by searching for the string " ` key: "piksi_ ` ", as
follows. | |
ros_instantiate/readmessageshtml_62.txt |
msgStructs = readMessages(bSel,'DataFormat','struct');
msgStructs{1}
ans = _struct with fields:_
MessageType: 'turtlesim/Pose'
X: 5.5016
Y: 6.3965
Theta: 4.5377
LinearVelocity: 1
AngularVelocity: 0... | |
ros_instantiate/readmessageshtml_5.txt | * [ Products ](https://www.mathworks.com/products.html?s_tid=gn_ps)
* [ Solutions ](https://www.mathworks.com/solutions.html?s_tid=gn_sol)
* [ Academia ](https://www.mathworks.com/academia.html?s_tid=gn_acad)
* [ Support ](https://www.mathworks.com/help/?s_tid=gn_supp)
* [ Community ](https://www.mathworks.co... | |
ros_instantiate/reading20msgs20from2_41.txt | # Option 2: use the ros_readbagfile script to easily extract the topics of
interest | |
ros_instantiate/readmessageshtml_88.txt | You must specify ` "DataFormat","struct" ` in the function to get messages as
a cell array of structures. Using structures can be significantly faster than
using message objects, and custom message data can be read directly without
loading message definitions using [ ` rosgenmsg ` ](rosgenmsg.html) . | |
ros_instantiate/Commandline_187.txt | * Suppress noncritical messages.
$ rosbag reindex -q *.bag | |
ros_instantiate/Commandline_152.txt | The bag format supports interleaving compressed data chunks with uncompressed
chunks in a single bag. Running ` rosbag compress ` on a bag with compressed
data chunks will decompress and compress the bag using the specified
compression format. | |
ros_instantiate/readmessageshtml_111.txt | You can also select a web site from the following list: | |
ros_instantiate/Commandline_155.txt | * Show the usage and exit.
$ rosbag compress -h | |
ros_instantiate/reading20msgs20from2_57.txt | Now that you have the .yaml file (produced from the .bag file), here are some
demonstrations of how to scan it for a list of keys or text strings you are
interested in to see if certain data is present. | |
ros_instantiate/readmessageshtml_48.txt | [ Open Live Script
](matlab:openExample\('ros/ReturnROSMessagesAsACellArrayROSExample'\)) | |
ros_instantiate/readmessageshtml_94.txt | To use ROS messages as structures, use the ` "DataFormat" ` name-value
argument when creating your publishers, subscribers, or other ROS objects. Any
messages generated from these objects will utilize structures. | |
ros_instantiate/pythonapirosbagwrite_14.txt | [ **asked 2021-03-16 15:14:04 -0500 ** ](/questions/374115/revisions/) | |
ros_instantiate/pythonapirosbagwrite_46.txt | [ 
](/users/71807/asdewar/) [ Asdewar ](/users/71807/asdewar/) ( 2021-03-25
09:31:28 -0500 ) edit | |
ros_instantiate/Commandline_29.txt | ` rosbag record ` subscribes to topics and writes a bag file with the contents
of all messages published on those topics. The file contains interlaced,
serialized ROS messages dumped directly to a single file as they come in over
the wire. This is the most performance and disk-friendly recording format
possible. To fur... | |
ros_instantiate/classrosbag11Message_5.txt |
## Friends And Related Function Documentation
## ◆ View
| friend class [ View ](classrosbag_1_1View.html)
---
friend
Definition at line [ 93 ](message__instance_8h_source.html#l00093) of file [
message_instance.h ](message__instance_8h_source.html) .
## Member Data Documentation
## ◆ bag_
| [ Bag ](cl... | |
ros_instantiate/Commandline_96.txt | * ` --queue=SIZE `
* Use an outgoing queue of size SIZE (defaults to 0. As of **1.3.3** defaults to 100).
$ rosbag play --queue=1000 recorded1.bag | |
ros_instantiate/pythonapirosbagwrite_25.txt | Probably not, what do you mean? I have to install it like a python module? I
only have that .msg file but I did not know that it could be installed. | |
ros_instantiate/pythonapirosbagwrite_1.txt |
ROS Resources: [ Documentation ](http://wiki.ros.org/) | [ Support
](http://wiki.ros.org/Support) | [ Discussion Forum
](http://discourse.ros.org/) | [ Index ](http://index.ros.org/) | [ Service
Status ](http://status.ros.org/) | [ ros @ Robotics Stack Exchange
](https://robotics.stackexchange.com/questions/tagged/r... | |
ros_instantiate/readmessageshtml_15.txt | Open Mobile Search | |
ros_instantiate/readmessageshtml_70.txt | Create a ` rosbagreader ` object of all the messages in the rosbag log file. | |
ros_instantiate/readmessageshtml_114.txt | ### Americas | |
ros_instantiate/readmessageshtml_24.txt | * Documentation
* [ Examples ](../examples.html?category=ros-bag-file-logging-and-analysis&s_tid=CRUX_topnav)
* [ Functions ](../referencelist.html?type=function&category=ros-bag-file-logging-and-analysis&s_tid=CRUX_topnav)
* [ Blocks ](../referencelist.html?type=block&category=ros-bag-file-logging-and-analysi... | |
ros_instantiate/Commandline_166.txt | A backup of each bag file (with the extension ` .orig.bag ` ) is made before
the bag is decompressed. If the backup file already exists (and the ` -f `
option isn't specified) then the tool will not decompress the file. | |
ros_instantiate/Commandline_114.txt | See more instructions and usage examples on the [ rosbag migration page
](/rosbag/migration) . | |
ros_instantiate/reading20msgs20from2_76.txt |
time ros_readbagfile large_bag_file.bag /topic1 | |
ros_instantiate/Commandline_127.txt | * ` fix <in-bag> <out-bag> [rules.bmr] `
* Repairs a bag using registered rules (and optionally locally defined rules).
$ rosbag fix old.bag repaired.bag myrules.bmr | |
ros_instantiate/reading20msgs20from2_11.txt | Contents | |
ros_instantiate/Commandline_33.txt | * Show the usage and exit.
$ rosbag record -h | |
ros_instantiate/Commandline_128.txt | ` -h ` , ` --help ` | |
ros_instantiate/Commandline_132.txt | ## rosbag filter | |
ros_instantiate/Commandline_15.txt | It can record a bag, republish the messages from one or more bags, summarize
the contents of a bag, check a bag's message definitions, filter a bag's
messages based on a Python expression, compress and decompress a bag and
rebuild a bag's index. | |
ros_instantiate/readmessageshtml_54.txt |
firstMsgs = readMessages(bagselect2,1:10); | |
ros_instantiate/pythonapirosbagwrite_28.txt | ## 1 Answer | |
ros_instantiate/readmessageshtml_85.txt | [ collapse all ](javascript:void\(0\);) | |
ros_instantiate/readmessageshtml_113.txt | Select the China site (in Chinese or English) for best site performance. Other
MathWorks country sites are not optimized for visits from your location. | |
ros_instantiate/reading20msgs20from2_4.txt | * [ Distributions ](/Distributions)
* [ ROS/Installation ](/ROS/Installation)
* [ ROS/Tutorials ](/ROS/Tutorials)
* [ RecentChanges ](/RecentChanges)
* [ reading msg... a bag file ](/rosbag/Tutorials/reading%20msgs%20from%20a%20bag%20file) | |
ros_instantiate/pythonapirosbagwrite_37.txt | The output should match the message definition: | |
ros_instantiate/Commandline_181.txt | * Show the usage and exit.
$ rosbag reindex -h | |
ros_instantiate/Commandline_146.txt | To filter based on time, convert the time to a floating point number (use UNIX
time, to get this value, use rosbag info): | |
ros_instantiate/readmessageshtml_46.txt | [ collapse all ](javascript:void\(0\);) | |
ros_instantiate/pythonapirosbagwrite_42.txt | [ edit ](/s/answers/374173/edit/) flag offensive delete [ link
](/question/374115/python-api-rosbag-write-custom-message/?answer=374173#post-
id-374173 "permanent link") more | |
ros_instantiate/pythonapirosbagwrite_10.txt | edit | |
ros_instantiate/Commandline_11.txt | # See Also: | |
ros_instantiate/Commandline_13.txt | # rosbag command-line tool: | |
ros_instantiate/readmessageshtml_52.txt |
allMsgs = readMessages(bagselect2); | |
ros_instantiate/Commandline_49.txt | ` -o PREFIX ` , ` --output-prefix=PREFIX ` | |
ros_instantiate/readmessageshtml_66.txt |  | |
ros_instantiate/Commandline_20.txt | * [ play ](/rosbag/Commandline#play)
* Play back the contents of one or more bag files. | |
ros_instantiate/Commandline_119.txt | * Generate a bag migration rule file named RULEFILE.
$ rosbag check -g diagnostics.bmr diag.bag | |
ros_instantiate/readmessageshtml_121.txt | Contact your local office | |
ros_instantiate/Commandline_53.txt | ` --split ` | |
ros_instantiate/readmessageshtml_28.txt | _Since R2019b_ | |
ros_instantiate/Commandline_36.txt | Note that newly published topics are discovered by periodically polling the
master. ` rosbag record -a ` will likely miss initial messages published on
any topic. | |
ros_instantiate/classrosbag11Message_1.txt | ](../../../../api/roscpp_traits/html/classboost_1_1shared__ptr.html) < T > |
[ instantiate
](classrosbag_1_1MessageInstance.html#a369b32708a1a8bdaad133a47152a4885) ()
const
| Templated call to instantiate a message. [ More...
](classrosbag_1_1MessageInstance.html#a369b32708a1a8bdaad133a47152a4885)
bool | [ is... | |
ros_instantiate/readmessageshtml_109.txt | * [ Switzerland (English) ](https://ch.mathworks.com)
* [ Switzerland (Deutsch) ](https://ch.mathworks.com)
* [ Switzerland (Français) ](https://ch.mathworks.com) | |
ros_instantiate/readmessageshtml_26.txt | # readMessages | |
ros_instantiate/pythonapirosbagwrite_60.txt | Seen: **2,105 times** | |
ros_instantiate/readmessageshtml_30.txt | ## Syntax | |
ros_instantiate/pythonapirosbagwrite_66.txt | [ ROS Melodic OpenCV xfeatures2d ](/question/312669/ros-melodic-opencv-
xfeatures2d/) | |
ros_instantiate/Commandline_137.txt | * the message | |
ros_instantiate/reading20msgs20from2_28.txt | 3. Open up another terminal. Note: to open up another terminal tab in the same terminal window you can use **Ctrl + Shift + T** on Ubuntu. Subscribe to the ` /obs1/gps/fix ` topic, echoing (printing) everything published on this topic, while also ` tee ` ing it to a file for later review, all in yaml format:
... | |
ros_instantiate/readmessageshtml_17.txt | * [ Documentation Home ](../../index.html?s_tid=CRUX_lftnav) | |
ros_instantiate/Commandline_178.txt | A backup of each bag file (with the extension ` .orig.bag ` ) is made before
the bag is reindexed. If the backup file already exists (and the ` -f ` option
isn't specified) then the tool will not reindex the file. |
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