Command line interface (CLI)

Access to RAMANMETRIX CLI tools is possible per request.

Compile from source code

RAMANMETRIX CLI comes with two options that can be used, a flow based( version for a guided user experience, or a argument based( verison for a more minimal use case or to be used programatically.

Opition 1:

  1. Clone the repository to a local directory.

        git clone 
  2. Create and activate your virtual environment.

        virtualenv your-env-name-here
  3. Run:

        pip install -r requirements.txt
  4. If the ramanmetrix_backend.exe is not installed in a default location, please take note of the installation pathway to lauch it manually through the CLI prompts. If you are unable to find it, the ramanmetrixArgCLI comes with a search command named exeFinder that can be run to find it.

  5. Run:


Option 2:

  1. git clone the repository to a local directory (*see optition 1)
  2. Create and activate your virtual environment (*see optition 1)
  3. If ramanmetrix_backend.exe is not installed in default location, please take note of installation pathway to lauch it manually through the CLI prompts.
  4. Run: python and build the package to a local directory. The program can then be called globally with the following namespace.

    ramanmetrixCLI or ramanmetrixArgCLI



  1. The user must choose whether to use the offline or online client. If the user would like to use the online client they must call the login command before any other chained commands. The user must provide their username as argument using --username or -u. Example of login call is seen below:

    # connection to online client
    ramanmetrixArgCLI login -u Demouser
  2. The user can then choose between 4 different analysis pathway commands:

    1. Train models
      1. --online/--offline (-on/-off): chooses which backend client to connect to.
      2. --params/--noparams (-p/-np): to be set if user wants to upload parameter file.
      3. --export/--noexport (-x/-nx): to be set if user wants to export model file.
    2. Preprocess
      1. --online/--offline (-on/-off): chooses which backend client to connect to.
      2. --export/--noexport (-x/-nx): to be set if user wants to export model file.
    3. Predict
      1. --online/--offline (-on/-off): chooses which backend client to connect to.
      2. --export/--noexport (-x/-nx): to be set if user wants to export model file.
    4. apiCall
      1. --online/--offline (-on/-off): chooses which backend client to connect to.
      2. --apicall (-a): argument keyword of apicall to make. These pathways are called by keyword and if the online client is chosen by chaining the command after the login command. Every command asks for boolean flags with the most important being --online/--offline(-on/-off) indicating which client to use.
#example train model call for online clients

ramanmetrixArgCLI login -u Demouser trainmodel -on -p -x 


The flow based CLI guides the user through a series of prompts that makes similar calls that the argument CLI does but is more user friendly. The user will first be asked if they would like to use the online or offline client. After which the same 4 analysis pathways may be selected for further analysis. After the analysis pathway is finished, the user is asked if they would like to restart the analysis and process more data. An example of the Flow CLI is depicted below:

Image from alias

Metadata loader

Packaged version of metadata loader is provided together with the desktop version distribution at RAMANMETRIX Setup\Tools\metadata-loader\metaloader.exe.

Access to the source code is possible per request.

Download and run Metaloader

The metaloader app allows the user to automatically load folder/file structures into a data table for creating the necessary metadata table needed for use with the RAMANMETRIX client. The program can be run locally or built to a specific operating system as an executbale using rust cargo crate manager. For convience purposes, the most recent pre-built versions for x86_64_windows and linux versions are available for download from the releases section of the gitlab repository Metaloader releasesopen in new window.

Compile from source code

If the operating system of the user is not prebuilt, the user can easily build the application locally using the following instructions:

Build locally using rust:

  1. Clone the repository to a local directory

    git clone
    cd ramanmetrix-metaloader
  2. Install rust

    curl --proto '=https' --tlsv1.2 -sSf | sh
  3. Rust trys to configure the PATH automatically during installation, however if it is not this must be added to enviroment variable path manually. The user can test if rust has been added to the PATH via:

    rustc --version
  4. The binary can then be built using the following command:

    cargo build --release
  5. The OS specifc binary will then be present and ready for use in the ./your-metaloader-dir/target/release


  1. Place the binary file where you would like the resulting metatables to be exported, then run the binary via the filebrowser or command line. This will then prompt the user to select the top directory where the metadata folder structure is located and a directory for exporting the resulting metatables. After completion the program will export two versions of the metatable one for folder only structure and one for file-based batch structure.
  2. The user can learn more about the correct folder structure to use in the following documentation section defined from folder structureopen in new window

Python module pyRamanmetrix

The module is accessible in the licensed desktop RAMANMETRIX. See details below.


Starting from RAMANMETRIX 0.4.0, scripts used for data loading, preprocessing, training, and prediction can be loaded as a python module. The following requirements need to be fulfilled:

  • RAMANMETRIX needs to be installed and licensed on the local computer.

  • The exact compatible version of Python need to be used. The required Python version can be verified using Help -> About in the top menu bar of RAMANMETRIX GUI. Python 3.10.4 is compatible with RAMANMETRIX 0.4.0 released in August 2022.

Importing pyRamanmetrix

Add path to the RAMANMETRIX/server folder of installed RAMANMETRIX to the environmental variable PATH. For example:

import sys
sys.path.insert(0, r"C:\Program Files\RAMANMETRIX\server")

The default location for a system-wide installation is C:\Program Files\RAMANMETRIX\server and the location for a per-user installation is %LOCALAPPDATA%\Programs\RAMANMETRIX\server.

If an older version of RAMANMETRIX was previously installed, then the installation could be in a folder named ramanmetrix_desktop instead of RAMANMETRIX.

Alternatively, to search among all possible default locations of the installation, the following code can be used.

import sys
import os
for dirname in ["RAMANMETRIX", "ramanmetrix_desktop"]:
    for root in ["C:/Program Files", os.getenv("LOCALAPPDATA") + "/Programs"]:
        p = os.path.normpath(os.path.join(root, dirname, "server"))
        if os.path.exists(p):
            print(f"Adding to %PATH%: {p}")
            sys.path.insert(0, p)
            print(f"Folder not found: {p}")

Import scripts as package

import pyRamanmetrix

Preprocess data, train and test models

Import desired modules:

from pyRamanmetrix import SpData, preprocess, train, predict

Load training data and parse the metadata:

data = SpData()
data.extract_metadata()['Metadata tables']

Set parameters:

data.parameters['despike_type'] = 'default'
data.parameters['model_validation'] = 'batch'
data.parameters['model_type'] = 'pcalda'
data.parameters['model_ncomp_auto'] = True

Preprocess data:

data = preprocess.despike(data)
data = preprocess.calibrate(data, update_reference=True)
data = data.get_corr("corr_calib")
data = data.aggregate_by(data.parameters["calib_aggr_by"])
data = preprocess.background(data, update_reference=True)
data = data.aggregate_by(data.parameters["baseline_aggr_by"])
data = preprocess.normalize(data, update_reference=True)
data = data.get_corr("corr_prpr")

Quality check and training:

data = preprocess.quality(data)
data = train(data)

Load, preprocess, and predict test data:

data_test = SpData()
data_test.extract_metadata()['Metadata tables']

data_test.models = data.models
data_test.parameters = data.parameters
if data_test.parameters["model_classes_name"] in data_test.metadata.columns:
    data_test.metadata.type = data_test.metadata[data_test.parameters["model_classes_name"]]

data_test = preprocess.despike(data_test)
data_test = preprocess.calibrate(data_test)
data_test = data_test.get_corr("corr_calib")
data_test = data_test.aggregate_by(data_test.parameters["calib_aggr_by"])
data_test = preprocess.background(data_test)
data_test = data_test.aggregate_by(data_test.parameters["baseline_aggr_by"])
data_test = preprocess.normalize(data_test)
data_test = data_test.get_corr("corr_prpr")
data_test = preprocess.quality(data_test)
data_test = predict(data_test)

The resulting object contains prediction results as a 'dict' under "results" attribute. To see the available dict fields use the following line:


Backend APIs

Backend of RAMANMETRIX can be accessed via HTTPS requests from any other software. To use the backend APIs, install and license RAMANMETRIX on your local computer.

Access backend APIs

Option 1: running software

  1. Start RAMANMETRIX normally.
  2. Access backend APIs through http://localhost:5001/api/%API_name%.

Option 2: start backend using file explorer

  1. Using file explorer go to the folder where the ramanmetrix_backend.exe is located, e.g.: %LocalAppData%\Programs\RAMANMETRIX\server.
  2. Double click on ramanmetrix_backend.exe.
  3. Access backend APIs through http://localhost:5000/api/%API_name%.

Option 3: start backend from command line

  1. Press Win+R , type cmd and press Enter to open command prompt.
  2. Change directory to the server folder of the installed software using cd command, e.g.:
    cd "%LocalAppData%\Programs\RAMANMETRIX\server"
  3. Start backend on the specified (e.g. 8000) port
    ramanmetrix_backend 8000
  4. Access backend APIs on the specified port through http://localhost:8000/api/%API_name%.


Please keep in mind that a correct port has to be used:

  • For backend running solely: 5000 or custom specified
  • For software running with GUI: 5001 (or 5002, 5003, … for multiple windows running)

Available APIs

  • /api/defaults - accepts parameters in JSON format passed as POST request. Need to be run to initialize the session! Python example:

    import requests
    response ="http://localhost:5000/api/defaults",
        cookies={"session_ramanmetrix_5000": "session_001"},
        json={'baseline_type': 'snip', 'baseline_iterations': 40})
  • /api/model_upload - accepts POST requests with a single model file (*.pkl) passed as file variable.

  • /api/upload_test - accepts POST requests with a single file with spectra (*.zip) passed as file variable.

  • /api/despike_data, /api/calibrate_data, /api/bg_correct_data, /api/normalize_data, /api/train_model - APIs for training data pretreatment, preprocessing, and model construction.

  • /api/get_mean_raw_test, /api/test_prpr, /api/test_model - APIs for test data pretreatment, preprocessing, and model testing.

  • /api/predict_json - The API that is most suitable for on-a-fly predictions. Runs preprocessing and pretreatment of the spectra passed in the request. Accepts JSON request with the following fields: x(list of wavenumber values), y(list of lists with intensity values), standard (optional, list or list of lists with standard spectra), standard_intensity (optional, list of lists with standard intensity spectra), dark_bg (optional, list of lists with measured dark background).

On-a-fly predictions

First, start RAMANMETRIX backend as described in Access backend APIs.

Initialize the session.

import requests
port = 5000                             # port where backend is running (use port 5001 for the version with GUI)
session_id = 'unique_session_ID'        # unique session ID (e.g. generated by os.urandom(8).hex())
API = "http://localhost:" + str(port) + "/api/"
cookies = {"session_ramanmetrix_" + str(port): session_id}

# get (initialize) default parameters
response = + "defaults", cookies=cookies)

Import model from file

file_model = "Examples/Predict test data/model_LDA_species.pkl"
response = + "model_upload", cookies=cookies,
                         files={"file": open(file_model, 'rb')})

Load spectra as dict (compatible with JSON)

import json
data = json.load(open('Backend APIs/data.json', 'r'))

Send, process and predict data loaded as JSON POST request (single API)

response = + "predict_json", cookies=cookies, json=data)

Other examples

A few minimal examples are provided together with the desktop version distribution at RAMANMETRIX Setup\Backend APIs:

  • minimal_test.html - An example of an HTML form which can be used to submit model and sata and obtain the results.
  • - an examples of training the model via API using Python.
  • - an examples of applying the model via API using Python.
  • - a minimal example of applying models sequentially.