Tutorial1_functions_filehandling

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diff --git a/Tutorial1/Scilab_code/Tutorial1_function.sce b/Tutorial1/Scilab_code/Tutorial1_function.sce
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+//This Matlab script is used to compute mean and standard deviation of data
+
+//Clears all previous variables stored
+clear 
+
+//Clears screen
+clc
+
+
+//Executing the mymean function that computes the mean of a given data
+exec mymean.sci;
+//Executing the mystdev function that computes the standard deviation of a given data
+exec mystdev.sci;
+
+
+//Data for which the mean and standard-deviation is required
+x = [1 2 5];
+
+//Calling the mymean function. It takes data (a vector) as the input argument and returns mean of the data as output
+mean_of_x = mymean(x);
+disp(mean_of_x,'Mean of x');
+
+//Calling the mystdev function. It takes data (a vector) and its mean as the input argument 
+//It returns standard deviation of the data as output
+stddev_of_x = mystdev(x,mean_of_x);
+disp(stddev_of_x,'Standard deviation of x');
+
diff --git a/Tutorial1/Scilab_code/Tutotial1_input_files.sci b/Tutorial1/Scilab_code/Tutotial1_input_files.sci
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+//This function is to import data from a csv file and store it in a variable
+//Using the data mean and standard deviation of the data is computed
+clear
+clc
+
+exec mymean.sci;
+exec mystdev.sci;
+
+//Import data from file
+Data = csvRead('/home/chayan/Documents/scilab-tutorials/Tutorial1/Data/Tut1_data1.csv');
+x = Data(:,1);
+y = Data(:,2);
+
+
+//Compute mean of the imported data
+mean_of_Data_x = mymean(x);
+
+//Compute standard deviation of the imported data
+standard_deviation_of_Data_x= mystdev(x,mean_of_Data_x);
+
+
+//Display mean and standard deviation in command window
+disp(mean_of_Data_x,'Mean of x',standard_deviation_of_Data_x,'Standard deviation of x')
+
diff --git a/Tutorial1/Scilab_code/mymean.sci b/Tutorial1/Scilab_code/mymean.sci
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+++ b/Tutorial1/Scilab_code/mymean.sci
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+//Function to compute mean of a given data (a vector)
+
+function mean_of_data = mymean(data)
+    sum_of_data = 0;
+    for iteration = 1:1:length(data)
+        sum_of_data = data(iteration) + sum_of_data;
+    end
+    mean_of_data = sum_of_data/length(data);
+endfunction
diff --git a/Tutorial1/Scilab_code/mystdev.sci b/Tutorial1/Scilab_code/mystdev.sci
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+//A function to compute standard deviation of a given data
+//Input: Data (a vector) and mean of the data as input
+//Output: standard deviation of the data
+
+function standard_dev = mystdev(data,mean_of_data)
+    temp = (data - mean_of_data*ones(length(data)))^2;
+    standard_dev = sqrt(sum(temp)/(length(data)-1));
+endfunction