Update visualization.md

Implemented visualization methods in NiaARM

Author: HlisTilen

visualization.md

@@ -1,9 +1,7 @@
-# Visualizations
+# Implemented visualization methods in NiaARM
 
 ## Grouped matrix plot
 
-A grouped matrix plot visualizes the relationships between different groups of data. It is useful for identifying patterns and correlations within the dataset.
-
 ![Grouped matrix plot](./.github/images/grouped_matrix_plot.png)
 
 **Reference**: Hahsler M. in Karpienko R. (2017). Visualizing association rules in hierarchical
@@ -12,8 +10,6 @@ groups, Journal of Business Economics, 87, 3, str. 317–335,
 
 ## Hill slopes
 
-Hill slopes plots are used to visualize the steepness and direction of slopes in a dataset. They are often used in geographical and environmental data analysis.
-
 ![Hill slopes](./.github/images/hill_slopes.png)
 
 **Reference**: Fister Ml. I., Fister D., Iglesias A., Galvez A., Osaba E., Del Ser J. in Fister I. (2020).
@@ -25,8 +21,6 @@ Science(), vol 12489. Springer, Cham., str. 101-111,
 
 ## Sankey diagram
 
-A Sankey diagram is a flow diagram that shows the flow of data between different nodes. It is useful for visualizing the distribution and movement of data.
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 ![Sankey diagram](./.github/images/sankey.png)
 
 **Reference**: Fister Ml. I., Fister I., Fister D., Podgorelec V. in Salcedo-Sanz S. (2023). A
@@ -36,8 +30,6 @@ Applications, 233, str. 120901, [https://doi.org/10.1016/j.eswa.2023.120901](htt
 
 ## Scatter plot
 
-A scatter plot displays values for typically two variables for a set of data. It is useful for identifying relationships and correlations between the variables.
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 ![Scatter plot](./.github/images/scatter_plot.png)
 
 **Reference**: Fister Ml. I., Fister I., Fister D., Podgorelec V. in Salcedo-Sanz S. (2023). A
@@ -47,8 +39,6 @@ Applications, 233, str. 120901, [https://doi.org/10.1016/j.eswa.2023.120901](htt
 
 ## Two-key plot
 
-A two-key plot visualizes the relationship between two key metrics in a dataset. It is useful for comparing and contrasting the metrics to identify trends and patterns.
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 ![Two-key plot](./.github/images/two_key.png)
 
 **Reference**: Fister Ml. I., Fister I., Fister D., Podgorelec V. in Salcedo-Sanz S. (2023). A