![]() ![]() In computer programming languages in general, the equals sign doesn’t exactly mean two things are equivalent, instead, it functions as an assignment operator, setting the value of some statement to a following statement. FORTRAN is believed to be the first computer language to make use of the equals sign, with the sign being included in revisions to FORTRAN in 1957. However, the equals sign is often used in other fields, such as in computer programming. In math, using the equals sign asserts that two statements or variables are equivalent to one another. Beyond that, Rercorde helped introduce the world at large to concepts of data manipulation and quantification, with theories and instructions on applying mathematics to various domains such as navigation, commerce, land surveying, and astronomy. Recorde’s equals sign and other contributions to mathematical theory and operators gave computer scientists a ubiquitous and universally recognized symbol to assign values and assert a quality. ![]() ![]() It is arguable that Recorde laid the foundation for the discipline of computer science, as computer science is at its core about processing, creating, and collecting data. So the more equations you know, the more you can converse with the cosmos.” - Neil DeGrasse Tyson A vertical equals sign, rather than a horizontal equals sign, may have been used throughout the 1600s, with the now universally used horizontal equal sign becoming standardized over the course of the 1700s. This gave Recorde’s equals sign some extra influence, as when combined with + and – the equals sign could easily be used to assert mathematical equations that took much longer to write out. However, Recorde had introduced English speakers to the now-famous German symbols for subtraction and addition: “+” and “-”. One reason that Recorde’s symbol may have been slow to catch on was that in the 16th century Latin still heavily influenced communication, and the term “aequalis” was frequently just shortened to “Ae” or “oe” if an abbreviation was required. While Recorde’s new equals sign succinctly implied equality between two values, it wasn’t widely adopted until much later. Photo: By Robert Recorde –, Public Domain, Thank you very much in advance.A representation of the first known equation, equivalent to 14x + 15 = 71. How can I do it using SPSS? I think you have to use the select cases tool, but I don’t know how to select cases (or variables) upon cases (or variables). After I would later compare the same selected group with patients with hyperglycemia (1), which also have skin rash (1) and did not received corticosteroids (0). However, the patients, based on ulcer location, should also be subclassifed as patients with hyperglycemia (1), which also have skin rash (1) and received corticosteroids (1). In other words, let’s imagine we have a database from 10000 patients with crohn’s disease, I want to select ulcer location (loc-1, loc-2, loc3 and loc-4), for later comparison. Variable 4 includes selected patients from the previous variables based on the output. patients with variable 1 (1) which don't have variable 2 (0), but has variable 3 (1) and variable 4 (1). I want to work on this data based on multiple cases selection or subgroups, e.g. I have a data base of patients which contain multiple variables as yes=1, no=0. Hi, I am new on SPSS, I hope you can provide some insights on the following. ![]()
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