Shrey Jain

10 Questions 8 Answers 0 Followers

Questions related from Shrey Jain

How to use Pipelines for imputation and encoding?

I am trying a Regression model on a dataset which has categorical and numerical variables along with nan values. I want to use Pipelines for imputation and encoding purposes. Now I have a few...

19 July 2021 9,945 0 View

Why is pd.concat increasing my row count and also returning nan values?

I am trying to one hot encode my train and test dataset. For my train dataset, I have 2 dataframes with different number of columns but same number of rows.A (with encoded features) = (34164, 293)...

17 July 2021 1,670 0 View

Why am I getting worse performance after GridSearchCV?

I first construct a base model (default parameters) and obtain MAE (rfr base file for image). # BASELINE MODEL rfr_pipe.fit(train_x, train_y) base_rfr_pred = rfr_pipe.predict(test_x)...

04 July 2021 10,023 0 View

Different results for mean absolute error when performing GridSearchCV vs when manually optimising the max_leaf_node parameter in Decision Tree model?

I am trying out hyperparameter tuning vs manually selecting best parameter (max_leaf_nodes) on a Decision Tree model with mean absolute error as scoring. In theory both should give me the same mae...

30 June 2021 3,222 3 View

Should I first split the data into train and validation sets and then use GridSearchCV on the training set followed by K Fold CV on my training set?

I am having a lot of confusion between GridSearchCV and K fold Cross Validation. I know that GridSearch is only for hyperparameter optimization and K Fold will split my data into K folds and...

27 June 2021 9,554 2 View

How do I calculate the correlation between two categorical variables in Python?

I am using Logistics Regression on a dataset where the dependent variable is a categorical one. I have multiple independent variables some of which are categorical. I want to know which of them...

04 June 2021 6,636 4 View

How do I increase the wettability of glass slides?

I want to synthesize thin films on glass substrate and in order to do so I need to increase the wettability of my substrate. Apart from RCA cleaning and plasma treatment is there any other way to...

13 April 2021 3,131 3 View

How do I overcome the "coffee ring" effect while performing drop casting?

I am trying to synthesize MoS2 thin film on a glass substrate using drop casting method but I am getting the "coffee ring" effect on the substrate. How do I get rid of the rings and instead get...

23 March 2021 7,308 15 View

How do I calculate absorption coefficient of my thin film if I dont know the thickness? Or how can I calculate the thickness of my sample?

I have done Uv-vis characterisation of my thin film and have received absorbance and transmittance data. Now I want to calculate the absorption coefficient but I dont know the thickness of my...

22 February 2021 7,490 8 View

What software would you say is the best for XRD analysis which has the option of profile fitting?

I am analyzing the data obtained from powder diffraction of a MoS2 thin film. I want to assign phases to the peaks obtained in my pattern. The software that I'm currently using is PowderX but it...

11 February 2021 7,498 10 View