MLcps 0.0.6
Calculate a Machine Learning (ML) performance metric called MLcps: ML Cumulative Performance Score.
Requires Python: >=3.8

# MLcps
**MLcps: Machine Learning cumulative performance score** is a performance metric that combines multiple performance metrics and reports a cumulative score enabling researchers to compare the ML models using a single metric. MLcps provides a comprehensive platform to identify the best-performing ML model on any given dataset.

### ***Note***  
If you want to use MLcps without installing it on your local machine, please click here [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/FunctionalUrology/MLcps.git/main). It will launch a Jupyterlab server (all the requirements for MLcps are pre-installed ) where you can run the already available example Jupyter notebook for MLcps analysis. It may take a while to launch! You can also upload your data or notebook to perform the analysis.

# Prerequisites

1. Python >=3.8
2. R >=4.0. R should be accessible through terminal/command prompt.
3. ```radarchart, tibble,``` and ```dplyr``` R packages. MLcps can install all these packages at first import if unavailable, but we highly recommend installing them before using MLcps. The user could run the following R code in the R environment to install them:
```
## Install the unavailable packages
install.packages(c('radarchart','tibble','dplyr'),dependencies = TRUE,repos="https://cloud.r-project.org")                         
 ```

# Installation
```
pip install MLcps
```

# Binder environment for MLcps

As an alternative, we have built a binder computational environment where all the requirements are pre-installed for MLcps.
It allows the user to ***use MLcps without any installation***.

Please click here [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/FunctionalUrology/MLcps.git/main) to launch the Jupyterlab server where you can run the already available example Jupyter notebook for MLcps analysis. It may take a while to launch! You can also upload your data or notebook to perform the analysis.

# Usage
#### **Quick Start**
```python
#import MLcps
from MLcps import getCPS

#calculate Machine Learning cumulative performance score
cps=getCPS.calculate(object)
```  
> * ***object***: A pandas dataframe where rows are different metrics scores and columns are different ML models. **Or** a GridSearchCV object.
> * ***cps***: A pandas dataframe with models name and corresponding MLcps. **Or** a GridSearchCV object.

#### **Example 0.1**
Create Input dataframe for MLcps

```python
import pandas as pd
metrics_list=[]

#Metrics from SVC model (kernel=rbf)
acc = 0.88811 #accuracy
bacc = 0.86136 #balanced_accuracy
prec = 0.86 #precision
rec = 0.97727 #recall
f1 = 0.91489 #F1
mcc = 0.76677 #Matthews_correlation_coefficient
metrics_list.append([acc,bacc,prec,rec,f1,mcc])

#Metrics from SVC model (kernel=linear)
acc = 0.88811
bacc = 0.87841
prec = 0.90
rec = 0.92045
f1 = 0.91011
mcc = 0.76235
metrics_list.append([acc,bacc,prec,rec,f1,mcc])

#Metrics from KNN
acc = 0.78811
bacc = 0.82841
prec = 0.80
rec = 0.82
f1 = 0.8911
mcc = 0.71565
metrics_list.append([acc,bacc,prec,rec,f1,mcc])

metrics=pd.DataFrame(metrics_list,index=["SVM rbf","SVM linear","KNN"],
                     columns=["accuracy","balanced_accuracy","precision","recall",
                              "f1","Matthews_correlation_coefficient"])
print(metrics)
```

#### **Example 1**
Calculate MLcps for a pandas dataframe where rows are different metrics scores and columns are different ML models.

```python
#import MLcps
from MLcps import getCPS

#read input data (a dataframe) or load an example data
metrics=getCPS.sample_metrics()

#calculate Machine Learning cumulative performance score
cpsScore=getCPS.calculate(metrics)
print(cpsScore)

#########################################################
#plot MLcps
import plotly.express as px
from plotly.offline import plot
import plotly.io as pio
pio.renderers.default = 'iframe' #or pio.renderers.default = 'browser'

fig = px.bar(cpsScore, x='Score', y='Algorithms',color='Score',labels={'MLcps Score'},
             width=700,height=1000,text_auto=True)

fig.update_xaxes(title_text="MLcps")
plot(fig)
fig
```


#### **Example 2**
Calculate MLcps using the mean test score of all the metrics available in the given GridSearch object and return an updated GridSearch object. Returned GridSearch object contains ```mean_test_MLcps``` and ```rank_test_MLcps``` arrays, which can be used to rank the models similar to any other metric.

```python
#import MLcps
from MLcps import getCPS

#load GridSearch object or load it from package
gsObj=getCPS.sample_GridSearch_Object()

#calculate Machine Learning cumulative performance score
gsObj_updated=getCPS.calculate(gsObj)

#########################################################
#access MLcps
print("MLcps: ",gsObj_updated.cv_results_["mean_test_MLcps"])

#access rank array based on MLcps
print("Ranking based on MLcps:",gsObj_updated.cv_results_["rank_test_MLcps"])
```  

#### **Example 3**
Certain metrics are more significant than others in some cases. As an example, if the dataset is imbalanced, a high F1 score might be preferred to higher accuracy. A user can provide weights for metrics of interest while calculating MLcps in such a scenario. Weights should be a dictionary object where keys are metric names and values are corresponding weights. It can be passed as a parameter in ```getCPS.calculate()``` function.

  * **3.a)**

```python
#import MLcps
from MLcps import getCPS

#read input data (a dataframe) or load an example data
metrics=getCPS.sample_metrics()

#define weights
weights={"Accuracy":0.75,"F1": 1.25}

#calculate Machine Learning cumulative performance score
cpsScore=getCPS.calculate(metrics,weights)
print(cpsScore)

#########################################################
#plot weighted MLcps
import plotly.express as px
from plotly.offline import plot
import plotly.io as pio
pio.renderers.default = 'iframe' #or pio.renderers.default = 'browser'

fig = px.bar(cpsScore, x='Score', y='Algorithms',color='Score',labels={'MLcps Score'},
             width=700,height=1000,text_auto=True)

fig.update_xaxes(title_text="MLcps")
plot(fig)
fig
```  
  * **3.b)**
```python
#import MLcps
from MLcps import getCPS

#########################################################
#load GridSearch object or load it from package
gsObj=getCPS.sample_GridSearch_Object()

#define weights
weights={"accuracy":0.75,"f1": 1.25}

#calculate Machine Learning cumulative performance score
gsObj_updated=getCPS.calculate(gsObj,weights)

#########################################################
#access MLcps
print("MLcps: ",gsObj_updated.cv_results_["mean_test_MLcps"])

#access rank array based on MLcps
print("Ranking based on MLcps:",gsObj_updated.cv_results_["rank_test_MLcps"])

```  

# Links
<!--* For a general introduction of the tool and how to setting up MLcps:
  * Please watch  MLcps **[Setup video tutorial]()** (coming soon).  
  *  Please watch MLcps **[Introduction video tutorial]()** (coming soon).
-->
* MLcps source code and a Jupyter notebook with sample analyses is available on the **[MLcps GitHub repository](https://github.com/FunctionalUrology/MLcps/blob/main/Example-Notebook.ipynb)** and binder [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/FunctionalUrology/MLcps.git/main).
* Please use the  **[MLcps GitHub](https://github.com/FunctionalUrology/MLcps/issues)** repository to report all the issues.

# Citations Information
If **MLcps** in any way help you in your research work, please cite the MLcps publication.
***