VISUALISATION OF DATA

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VISUALISATION OF DATA

• 
  DR.PRADEEP KUMAR.K
• 
  III MD(HOM)
• 
  PRACTICE OF MEDICINE
• GHMC
  THIRUVANANTHAPURAM

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• Data- measured or counted facts or
• piece of information stated as a figure.
• eg height of a person,birth of a child
• OR
• The collective recording of information either
• numerical or otherwise is called data.

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• Data-
• Qualitative data
• Quantitative data-
• 1) Discrete data
• 
  2) continuous data

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Presentation of data

• 1. Tabular presentation
• 2. Diagramatic presentation

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Tabular presentation of data

• Both for qualitative and quantitative data

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Eg for Qualitative tableTuberculosis in India
in different years
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Quantitative tablepreliminary table for the
construction of frequency table
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Egfor a quantitative tableDistribution of BHMS
students in a class according to weight (in kg)
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• DIAGRAMATIC PRESENTATION

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visualisation of qualitative data

• 1.Bar diagram
• 2.Pie or sector diagram
• 3.pictogram or picture diagram
• 4.map diagram or spot map

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Bar diagram

• Easy method
• For visual comparison of magnitude
• of different frequencies in discrete
• data

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Simple Bar diagramsimple bar diagram(vertical)sho
wing the bloodgroup of students
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Horizontal Bar diagram showing the Blood group of
BHMS students
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Distribution of BHMS students according to ABO
blood group and Rh type
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2.Component bar diagramshowing Blood group and
Rh Type
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3.Percentage Bar diagramshowing the blood group
and Rh type
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4.Multiple bar diagramshowing the blood group
and Rh type
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PIE DIAGRAM OR PIE CHART OR SECTOR DIAGRAM
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SIMPLE PIE DIAGRAM SHOWING THE CANCER CASES
ACCORDING TO SITE
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PERCENTAGE PIE DIAGRAM SHOWING THE CANCER CASES
ACCORDING TO SITE
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PICTOGRAM OR PICTURE DIAGRAM

The burden of disease caused by HIV infection
AIDS ? Late HIV Diseases ? early HIV
disease
Developing countries


industrially
developed countries

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MAP DIAGRAM OR SPOT MAP
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Estimated infant mortality rates- 1989
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Jammu and kasmir 72
Himachalpradesh
77
punjab 72
Haryana 88
Rajasthan 103
Uttarpradesh 126
Assam93
Bihar 93
Gujarat 92
Madhyapradesh 124
Westbengal 82
Orissa 126
Maharashtra 66
Andra pradesh 87
Karnataka 89
Tamilnadu 80
Kerala 23
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VISUALISATION OF QUANTITATIVE DATA

• HISTOGRAM
• FREQUENCY POLYGON
• FREQUENCY CURVE
• CUMULATIVE FREQUENCY POLYGON OR OGIVE
• LINE DIAGRAM OR LINE CHART
• SCATTER OR DOT DIAGRAM

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HISTOGRAM
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Histogram showing the frequency of marks in a
class
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FREQUENCY POLYGONEg Distribution of patients
according to Hb level
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Frequency curve
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Cumulative frequency polygon or ogive
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Distribution of Hepatitis cases reported during
first 15 days since the outbreak
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Distribution of Hepatitis cases reported during
first 15 days since the outbreak
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Less than cumulative frequency polygon regarding
the hepatitis cases reported
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Greater than cumulative frequency polygon

• Distribution of hepatitis cases reported during
  first 15 days since the outbreak

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Greaterthan cumulative frequency polygon
regarding Hepatitis cases reported
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Cumulative frequency polygon or ogiveegLess
than cumulative frequency polygon
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Line diagramEgNo.of deaths reported from a
Medical college Health centre for 2001-2007
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Scatter diagram or dot diagram or correlation
graph
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Negative correlation
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THANK YOU