# Percentage increase and decrease from two matrices

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Joydeb Saha on 22 Dec 2022
Answered: Image Analyst on 22 Dec 2022
Attaching two matrices A1 and B1. I want to calculate the percentage increase and decrease
deltaSignal = (B1 - A1);
percentageDifference = deltaSignal ./ A1;
A1 from B1. Total percentage increase and the total percentage decrease. I have done some part which I am writing here.
Jan on 22 Dec 2022
@Joydeb Saha: How do you define "the percentage of increase of ice" mathematically? The image does not clarify this.
A mathematical definition of "percentage" means: A number of X divided by a number of Y times 100. So what are your X and Y for "total percentage increase and the total percentage decrease".

Image Analyst on 22 Dec 2022
You need to convert the image from RGB values to values on the color bar. See attached demo where I did that for a thermal image. ### Categories

Find more on Convert Image Type in Help Center and File Exchange

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